Which volcanoes are erupting now

A shift in the wind changed the direction of the plume in early October and is now traveling 5, miles across the Atlantic Ocean and over the Caribbean. It's possible change in the winds dampened the Atlantic's hurricane season, but more data is needed to confirm this hypothesis, per Gizmodo. La Palma's volcanic eruption has also affected the island's economy.

Half of La Palma's economy depends on its fruit exports. However, the volcanic heat and ash have ruined the island's crops, reports CBS News. La Palma's pristine salt flats located on the island's south end have turned black due to volcanic ash. Seismicity has been at relatively low levels this week compared to last week and we suspect that the lava dome-like feature was emplaced last week. Moderately elevated surface temperatures consistent with this feature were observed in satellite data on July Cloudy conditions have obscured views of the volcano by satellite most of the past week.

AVO will continue to closely monitor this new uplift feature. The prognosis for eruptive activity is uncertain.

Continued growth of the lava dome feature, additional explosive events, or a return to non-eruptive behaviors are all possible. AVO will report on significant changes and observations in monitoring data should they occur. Great Sitkin is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption.

Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data. It is located 43 km 26 miles east of the community of Adak. The volcano is a composite structure consisting of an older dissected volcano and a younger parasitic cone with a 3-km-diameter summit crater. A steep-sided lava dome, emplaced during an eruption in , occupies the center of the crater.

Great Sitkin erupted at least three times in the 20th century, most recently in That eruption produced at least one ash cloud that likely exceeded an altitude of 25, ft above sea level.

A poorly documented eruption occurred in , also producing a lava dome that was partially destroyed in the eruption. Within the past years a large explosive eruption produced pyroclastic flows that partially filled the Glacier Creek valley on the southwest flank.

Ash emissions were visible in satellite data beginning around UTC 1 pm AKDT to an altitude of less than 5, feet asl based on wind direction. Satellite observations from yesterday afternoon showed a robust steam plume and sulfur dioxide gas emissions. Additional ash emissions are probable, but not certain. No eruptive activity or emissions from the summit have been observed. This does not mean that an eruption is likely or imminent.

However, past eruptions of Pavlof occurred with little or no warning. Recent field operations were successful in restoring seismic stations on Veniaminof allowing AVO to resume monitoring potential activity at the volcano.

Recent eruptions in , , , and all occurred at the intracaldera cone and lasted for several months. These eruptions produced lava spattering and fountaining, minor emissions of ash and gas, and small lava flows into intracaldera icefield. Minor ash-producing explosions occurred nearly annually between and Previous historical eruptions have produced ash plumes that reached 15, to 20, ft above sea level , , and and ash fallout that blanketed areas within about 40 km 25 mi of the volcano , Satellite views over the past few weeks have detected elevated surface temperatures, and sulfur dioxide emissions were observed on several occasions, indicating continued volcanic unrest, but no recent ash deposits have been observed.

There have been no other notable changes at the volcano in satellite data or web camera views. Sulfur dioxide gas was detected in satellite imagery from Gareloi over the past week and is consistent with measurements from the last several years. No activity was observed by an AVO field crew flying over the summit on May Gareloi volcano persistently emits magmatic gases from a fumarole field on the south crater and commonly exhibits low-level seismic activity.

These observations suggest the presence of shallow magma and potential interaction with a hydrothermal system. The current increase in seismicity likely reflects a change to the magmatic-hydrothermal system, but it is not clear that the likelihood of a volcanic eruption has increased.

AVO will continue to monitor activity to determine if the recent changes are related to influx of new magma or other changes to the magma system.

Satellite observations showed very minor steaming and slightly elevated surface temperatures during breaks in the cloud cover yesterday afternoon. The prognosis for renewed eruptive activity is uncertain. Additional explosive events, the eruption of lava, or a return to non-eruptive behaviors are all possible. Should volcanic activity change significantly a new Volcanic Activity Notice will be issued. Visibility of the plume varies with humidity and temperature and may be stronger in the early morning.

Dwindling lava supply over the previous month had caused the active lava lake to shrink to two small ponds by May 11th and was completely crusted over by May 20th. The last surface activity on the lake was observed on May 23nd. Changes in the lava lake have been accompanied by a drop in gas emissions to levels close to pre-eruption background level. Seismic tremor persistent during the eruption has weakened significantly but continues to indicate some shallow magmatic activity.

Since May 11th, there has been weak inflation and an increase in shallow volcano tectonic earthquakes at the summit, suggesting magma entering the system is being stored at depth. There are currently no indications suggesting that a resumption of volcanic activity is imminent.

Sulfur dioxide SO2 gas emissions have greatly decreased. However, local concentrations of sulfur dioxide SO2 or hydrogen sulfide H2S may persist in downwind areas, and residents may from time to time notice odors of these gasses. Since that explosion, seismicity has decreased and satellite images show no further ash emissions.

Additional explosive events are possible, but not certain. The ash cloud from the initial explosive eruption is still visible in satellite images. Since that explosion, seismicity has decreased and satellite images show that the ash cloud has detached from the vent and is moving towards the east.

Initial mariner reports suggest the cloud is as high as 15, ft asl, but is still developing. These data indicate an increased potential for eruptive activity at Great Sitkin. Last week, elevated surface temperatures and sulfur dioxide emissions were observed in satellite data, and robust steaming was observed by AVO field crews on Adak Island. Small eruptions producing minor ash deposits within the vicinity of the active north crater of Mount Cerberus and ash clouds under 10, ft above sea level are typical of recent activity at Semisopochnoi.

Weather clouds up to 15, ft above sea level currently obscure the volcano. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay approximately 13 minutes if atmospheric conditions permit.

Satellite detections of increased volcanic gas emissions have been observed beginning on May In addition, there has been a slight increase in local seismicity over the past two days. These data indicate a potential for increased eruptive activity at Great Sitkin. These stations may come back online as snowpack decreases. Eruptive activity at Veniaminof usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera.

Ash emissions are typically confined to the summit crater, but larger events can result in ash fall in nearby communities and drifting airborne ash. Partly cloudy satellite views this week have shown no recent ash deposits or elevated surface temperatures, and only steam was observed within the north crater of Mount Cerberus. Sulfur dioxide emissions were observed this week on May 1 and 5, signifying continued volcanic unrest. AVO will continue to monitor activity at Semisopochnoi with satellite and regional infrasound data.

Satellite views of the volcano show a continuous plume extending 50 miles 80 km to the south at approximately feet a. A regional infrasound array has detected this increase in activity. Small eruptions producing minor ash deposits within the vicinity of the volcano and ash clouds under 10, ft above sea level are typical of activity at this volcano. Seismicity has continued to decline, but remains above background levels.

AVO continues to monitor Veniaminof with a local seismic stations, remote infrasound and lightning networks, and satellite and webcam images. As a result, AVO is unable to assess seismic unrest at this volcano. With four local seismic stations active, the Alaska Volcano Observatory can resume locating earthquakes and detect unrest at Tanaga.

Satellite views of the volcano have been mostly obscured, but a recent clearing suggests activity has declined and no significant ash plume was observed. It is likely that low-level eruptive activity continues and may not be detected by regional infrasound sensors or above the low clouds in satellite data. AVO will continue to monitor the situation. The ash cloud extends more than mi km southeast of the volcano with heights up to 20, feet 6 km above sea level.

The ash cloud extends up to mi km southeast of the volcano with heights up to 20, feet 6 km above sea level. Seismic activity remains elevated. The Alaska Volcano Observatory continues to monitor Veniaminof with a local seismic network, remote infrasound and lightning networks, and satellite and webcam images.

The Alaska Volcano Observatory continues to monitor Shishaldin with the local seismic, GPS, and tilt stations, web camera imagery, remote infrasound and lightning networks, and satellite images. No ash emissions or steam plumes were visible during clear weather conditions on April 1.

Elevated surface temperatures continue to be detected in satellite images, but are consistent with heat from recently erupted and now cooling lava flows. No significant seismicity or infrasound has been detected in the last 4 days. Pauses in eruptions are common, and lava flows and eruption of minor ash plumes could resume suddenly with little or no warning. Additional seismic stations may come back online this spring as snowpack decreases.

Seismic stations may come back online this spring as snowpack decreases. Any eruptive activity may still be detected, although with some delay, with regional infrasound networks, detection of lightning, and monitoring of satellite images. In addition, a local earthquake occurred on March 10 and it was large enough to be measured on seismometers km away on Umnak Island.

These data indicate a potential for increased eruptive activity at Cleveland. Explosions from Cleveland typically produce relatively small volcanic ash clouds that dissipate within hours; however, more significant ash emissions are possible. Cloudy weather conditions are obscuring satellite views of the volcano. It is unknown if the explosion produced a low-level ash cloud or local ash deposit. Small eruptions producing minor ash deposits within the vicinity of the volcano are typical of activity during unrest at Semisopochnoi since September Local seismic stations have been offline since November 11, New explosions could occur at anytime with no warning.

An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit. Satellite and webcam views indicate low-elevation Eruptive activity usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera.

Clouds obscured views into the crater and the southern side of the volcano. Any ash clouds associated with these deposits have not been observed and are likely low-level Small eruptions producing minor ash deposits within the vicinity of the volcano are typical of activity during unrest at Semisopochnoi since September Steam emissions obscured views into the crater. Small eruptions producing minor ash deposits within the vicinity of the volcano are typical of activity during unrest at Semisopochnoi since September , with the last detected activity in June The most recent activity in mid-March was confined to the summit crater except for minor ash deposits near the summit.

Only minor rockfalls within the summit crater, not associated with eruptive activity, have been detected since early April. Pauses in eruptions are common at Shishaldin, and therefore eruptive activity could resume with little warning. The Alaska Volcano Observatory will continue to monitor the volcano closely.

The Alaska Volcano Observatory continues to monitor Shishaldin with the local web camera imagery, satellite data and remote infrasound, seismic and lightning networks.

The Alaska Volcano Observatory continues to monitor Veniaminof with satellite data and remote infrasound, seismic and lightning networks. At p. The eruption is currently taking place entirely within the park. HST on the evening of December 20, accompanied by ground deformation detected by tiltmeters. The steam plume dissipated shortly thereafter.

The lava lake has been rising approximately several meters yards an hour since the eruption began. The current lava lake exhibits a circulating perimeter, but stagnant center.

Rates of tilting have decreased slightly since the beginning of the eruption. Increased rates of seismicity in the summit region continue. Some of these earthquakes may be felt. A magnitude Visitors to the Hawai'i Volcanoes National Park should note that under southerly non-trade wind conditions, rockfalls and explosions can result in a dusting of powdery to gritty ash composed of volcanic glass and rock fragments.

The body of water grew into a lake as the water sought equilibrium with the surrounding groundwater. Whereas this type of seismicity was observed on average once every few weeks following the eruption, rates have increased to over a dozen in the past several days.

Other monitoring data streams including volcanic gas and webcam imagery were stable until this eruption commenced. Prognosis: It is unclear how long the current eruption will continue. HVO continues to monitor the ongoing eruption and all aspects of the volcano closely; HVO will report any significant changes. If anything develops that may affect your safety, you will be informed. Contacts: askHVO usgs. As SO2 is released from the summit during this new eruption, it will react in the atmosphere with oxygen, sunlight, moisture, and other gases and particles, and within hours to days, convert to fine particles.

Vog creates the potential for airborne health hazards to residents and visitors, damages agricultural crops and other plants, and affects livestock operations.

High winds may waft lighter particles to greater distances. Residents are urged to minimize exposure to these volcanic particles, which can cause skin and eye irritation similar to volcanic ash. The situation is rapidly evolving and HVO will issue another statement when more information is available. While uplift related to post-collapse inflation of the summit reservoir has been occurring since March of , rates have been steadily increasing in recent months and are currently higher than they have been since the end of the eruption.

The injection resulted in about 8 cm 3 inches of uplift of the caldera floor, and modeling suggests that it represented 0.

Other monitoring data streams including volcanic gas and webcam imagery were stable until this eruption. An earthquake swarm began on the evening of December 20, accompanied by ground deformation detected by tiltmeters. An orange glow was subsequently observed on IR monitoring cameras and visually beginning approximately HST. At the present time, no explosions have been detected. The longest known eruptive pause was in , ending with eruption in the caldera. Neither that year pause, nor any other shorter pause, followed partial collapse of the caldera such as the collapse that occurred in the summer of Following partial caldera collapses, the first eruption outside the caldera took place on the East Rift Zone 17 years after the collapse, on the Southwest Rift Zone 28 years after the collapse, and on the Southwest Rift Zone 52 years after the collapse.

After partial caldera collapses in and , lava returned to the caldera within days to a few weeks. The length of the current pause exceeds those earlier post-collapse pauses. Since then, the body of water has grown into a lake, which continues to rise as it seeks equilibrium with the surrounding groundwater.

HVO continues to monitor the volcano closely and will report any significant changes. Seismic activity has returned to background levels and satellite observations over the past several weeks have shown no signs of unrest. Korovin is monitored by local seismic and infrasound sensors, satellite data, regional lightning detection instruments, and reports from local residents.

Observations of steaming are not unusual at Korovin and meteorological conditions can enhance its visibility. The volcano has two distinct summit vents about 0. The most recently active of the vents maintains a small, roiling, lake that occasionally produces energetic steam emissions. Thermal springs and fumaroles located on and near the volcano indicate an active hydrothermal system. Korovin has erupted several times in the past years, including , , and , and has likely had small ash emissions as recently as Typical recent Korovin eruptions produce minor amounts of ash and occasional but small lava flows.

Reports of the height of the ash plume produced by the eruption ranged from to 10, m 16, to 35, feet above sea level. Seismicity has persisted above background levels since that time, but had decreased to very low levels before a satellite link for transmitting seismic data failed on November 11, Since that time, no changes have been observed in satellite data, and no explosions have been detected from the Adak Island infrasound array. Low-level seismic unrest may be continuing undetected.

The satellite link is not likely to be reestablished without a site visit. Despite the lack of eruptive activity since mid-June, Semisopochnoi has been in a state of unrest since September , producing sporadic low-level explosions and elevated seismicity. Future small explosions may occur without warning and typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the erupting vent at North Cerberus. More significant ash emissions may be possible, but have not been observed during the — eruptive period.

Semisopochnoi is also monitored remotely with satellite observations and lightning sensors. Discrete earthquakes have been detected over the past two weeks and sulfur dioxide degassing has been detected four times in satellite data on October 15, 20 and Clear satellite views show no other signs of activity at this time.

AVO will continue to monitor the volcano for signs of volcanic activity. Korovin is monitored by local seismic and infrasound sensors, satellite data, and regional lightning detection instruments. No eruptive activity or unusual surface temperatures have been observed in clear satellite imagery.

AVO will continue to monitor the volcano using seismic, infrasound, web camera, and satellite observations. As at other Alaska volcanoes, AVO will continue to monitor seismic, satellite, infrasound, and lightning data, and reports from pilots and ground observers to detect signs of eruptive activity. No eruptive activity or unusual surface temperatures have been observed in clear satellite and web camera images.

Eruptions at Pavlof often occur with little or no precursory activity, and AVO will continue to monitor the volcano using seismic, infrasound, web camera, and satellite observations. No eruptive activity or emissions from the summit have been observed in cloudy satellite and web camera views. This earthquake sequence was focused within an area about 6 miles 10 km east of the summit at a depth of about 5 miles 8 km. Other data streams showed no signs of surface changes during the seismic sequence that started in June.

The volcano is monitored with a network of seismic instruments, web camera, GPS, satellite data, and regional infrasound and lightning detection instruments. Makushin is a broad, ice-capped stratovolcano which rises to an elevation of feet. The summit caldera, 3 km diameter, is the site of frequent steam and minor ash eruptions; however, no large eruptions have occurred in this century.

The community of Unalaska and port of Dutch Harbor are located 25 km 16 miles east of Makushin volcano. The last eruptive activity at Cleveland Volcano was a short-lived explosion on the evening local time of June 1, Since then, there has been no evidence from satellite observations of elevated surface temperatures, and there have been no observed changes in the summit crater. Tremor at Veniaminof in the past has sometimes preceded eruptions, but also can occur and persist for weeks to months and not result in an eruption.

The Alaska Volcano Observatory continues to closely monitor Veniaminof with local seismic sensors, satellite data, web cameras, and remote infrasound and lightning networks. Satellite views over the past few weeks suggest typical background surface temperatures and light steaming at the summit and no signs of new volcanic activity within the crater.

Shishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks. This represents a departure from background activity. This type of seismic activity typically precedes eruptive activity at Veniaminof but does not mean that an eruption will occur.

Eruptive activity usually consists of minor ash emissions, lava fountaining and lava flows from the small cone in the summit caldera. Veniaminof volcano is monitored by local seismic sensors, satellite data, web cameras, and remote infrasound and lightning networks. Cleveland is almost always in a state of unrest and explosions will occur without warning. They typically generate small clouds of volcanic ash that are a hazard in the immediate vicinity of the volcano. Ash fall on the upper flanks of the volcano is also common.

The local geophysical stations and web camera at Cleveland are currently unavailable due to an ongoing network outage. Rapid detection of an ash-producing eruption may be possible using a combination of regional infrasound, lightning, and satellite data. This represents a significant departure from background earthquake activity and may be associated with volcanic unrest.

This unrest could result a future eruption, however that is not a certainty. Aftershocks continue, as would be expected with earthquakes of this size. No other significant activity was detected and local monitoring stations are offline. A small ash plume was observed at 22, ft drifting to the south. Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption.

The last explosive eruption at Cleveland occurred on January 9, , and was followed by the extrusion of a small mound of lava in the summit crater. Since then, there has been an overall decrease in detected surface temperature and no observed changes in the summit crater. Cleveland is one of the most active volcanoes of the Aleutian Arc, and the latest eruptive phase has waxed and waned almost annually since Local seismic, infrasound, and web camera data have been mostly unavailable for several weeks due to an equipment failure in a remote facility.

Nonetheless, monitoring of Cleveland continues with regional seismic and infrasound stations on nearby islands. These, along with lightning and satellite data, should allow AVO to detect an ash-producing eruption, if one were to occur. Similarly, satellite views show no lava or changes within the crater since the start of April, accompanied by a decrease in surface temperatures.

Eruptive activity therefore appears to have ended or paused. Eruptive activity at Shishaldin paused after the explosion on January 19, , before resuming at a low level mid-March. It is therefore possible for eruptive activity to resume with little warning and AVO will continue to monitor the volcano closely.

A robust steam plume and a crater lake have been seen in clear satellite images, but no recent ash deposits. Although seismic activity remains above background, it does not appear to be increasing towards an eruption in the short-term. Unrest continues.

Seismic activity persists and is characterized by occasional small earthquakes and satellite data show detectable volcanic gas sulfur dioxide being emitted from the volcano.

Explosive activity could resume with little to no warning. No significant ash emissions have been detected in satellite images; clouds cover much of the island to around 10, ft.

Weak seismic tremor has also been detected. No significant ash or lava signatures are apparent outside the summit crater at this time. Eruptive activity could increase with little or no warning resulting in lava flows outside of the crater, lahars, and low-level ash clouds. During the current eruptive cycle, larger ash clouds have also been produced. No eruptive activity or emissions from the summit have been observed since minor steam emissions in late February. Repairs are not feasible during the winter months.

Without seismic data AVO cannot verify that the volcano is at its normal background state. Planned field work in April and during the summer will reestablish and improve the seismic monitoring network. At this time, rapid detection of an eruption if one were to occur may be possible using a combination of distant seismic and infrasound networks, lightning, and satellite data. Seismic activity persists and is characterized by short bursts of volcanic tremor and earthquakes.

What do you do when a sleeping volcano roars back to life? For more than three decades, countries around the world have called upon the U. At least volcanoes in 12 States and 2 territories have erupted in the past 12, years and have the potential to erupt again. Consequences of eruptions from U. Many aspects of our daily life are vulnerable to volcano hazards, Volcanic eruptions happen in the State of California about as frequently as the largest earthquakes on the San Andreas Fault Zone.

At least 10 eruptions have taken place in California in the past 1, years—most recently at Lassen Peak in Lassen Volcanic National Park to in the northern part of the State—and future Viewing an erupting volcano is a memorable experience, one that has inspired fear, superstition, worship, curiosity, and fascination since before the dawn of civilization.

In modern times, volcanic phenomena have attracted intense scientific interest, because they provide the key to understanding processes that have created and shaped more than Eruption of Yellowstone's Old Faithful Geyser. Yellowstone hosts the world's largest and most diverse collection of natural thermal features, which are the surface expression of magmatic heat at shallow depths in the crust. Volcanoes have been erupting in the Cascade Range for over , years.

During the past 4, years eruptions have occurred at an average rate of about 2 per century. This chart shows 13 volcanoes on a map of Washington, Oregon, and northern California and time lines for each showing the ages of their eruptions. Our Earth is a dynamic planet, as clearly illustrated on the main map by its topography, over volcanoes, 44, earthquakes, and impact craters. These features largely reflect the movements of Earth's major tectonic plates and many smaller plates or fragments of plates including microplates.

Volcanic eruptions and earthquakes are awe The Cascade Range of the Pacific Northwest has more than a dozen potentially active volcanoes. Cascade volcanoes tend to erupt explosively, and on average two eruptions occur per century?

Helens, Washington ? To help protect the Pacific Northwest? In the early s, the emergence of the theory of plate tectonics started a revolution in the earth sciences. Since then, scientists have verified and refined this theory, and now have a much better understanding of how our planet has been shaped by plate-tectonic processes.

We now know that, directly or indirectly, plate tectonics Helens was waking up. Within a week, several eruptions blasted clouds of ash into the atmosphere, and soon after, a new lava dome emerged in the crater. For press inquiries, please email volcanomedia usgs. Tambora just over years ago. But for a small group of New England-based researchers, one more Tambora story needed to be told, one related to its catastrophic effects in the Gulf of Maine that may carry lessons for intertwined human-natural systems facing climate change today.

There are approximately 1, potentially active volcanoes around the world. VDAP works to reduce loss of life and property, limit economic impact and prevent volcanic crises from becoming disasters. Volcanic eruptions occur int he State about as frequently as the large San Andreas Fault Zone earthquakes. California's "watch list" volcanoes are dispersed throughout the State and future eruptions are inevitable—the likelihood of renewed volcanism is on the order of one in a few hundred to one in a few thousand annually.

The United States has active volcanoes. More than half of them could erupt explosively, sending ash up to 20, or 30, feet where commercial air traffic flies. USGS scientists are working to improve our understanding of volcano hazards to help protect communities and reduce the risks. Learn and participate in early warning systems and develop plans for both evacuating and sheltering in place. Be aware of secondary hazards such as landslides, lahars mudflows , ash and thunderstorms.

Protect your home from volcanic ash and cover water sources if time allows. Avoid driving during and after ash fall when visibility can be very low and roads are slippery. Protect your lungs and eyes by wearing protective gear such as goggles and masks. Pay particular attention to vulnerable people and support them to evacuate or shelter in place. Follow official instructions from local authorities on whether to evacuate or take shelter. If you get warning prior to ash fall, return home from school or work and shelter in place.

If the ash fall is heavy, do not remain in a building that has a low-pitched or flat roof.