Articles tagged "alaska"

veniaminof march 24 2021 f

Renewed activity at Veniaminof volcano, Aviation Color Code raised to Orange, Alaska

Low-level ash emissions from the summit of Veniaminof volcano, Alaska were observed in web camera views on April 5, 2021, the Alaska Volcano Observatory (AVO) reported at 20:49 UTC. Because of the renewed activity, AVO has raised the Aviation Color Code to ORANGE...

April 06, 2021

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Unexpected strike-slip earthquake uncovers hidden mechanism

Researchers uncovered the reason for unexpected strike-slip earthquakes, where two pieces of crust slide past each other on a fault, in areas where subduction zone tremors are common. From July to October 2020, a series of earthquakes occurred in Shumagin Islands,...

March 27, 2021

cleveland volcano march 16 2021 f

Increased gas emissions and elevated surface temperatures at Cleveland volcano, Alaska

The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code for Cleveland volcano to Yellow and the Volcano Alert Level to Advisory at 21:44 UTC on March 20, 2021. Satellite detections of increased volcanic gas emissions and elevated surface temperatures...

March 21, 2021

semisopochnoi february 2021 f

Small explosion at Semisopochnoi volcano, Aviation Color Code raised to Orange, Alaska

Regional infrasound sensors detected a small explosion at Semisopochnoi volcano, Alaska on March 19, 2021, indicating an increase in eruptive activity. As a result, the Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to ORANGE and the Volcano...

March 19, 2021

veniaminof march 4 2021 ashy eruption f

Veniaminof volcano alert level raised after sensors detect small explosion, Alaska

The Alaska Volcano Observatory (AVO) has raised the Volcano Alert Level to Watch and the Aviation Color Code to Orange for Veniaminof volcano at 18:04 UTC on March 4, 2021. The last time this volcano erupted was in 2018 (VEI 1). According to Volcano Observatory...

March 04, 2021

us avalanche feb 2021

At least 15 dead as the U.S. sees the deadliest week of avalanches in over a century

At least 15 people lost their lives due to avalanches in the U.S. from January 30 to February 6 this year-- the worst and deadliest in the country since 1910, according to the Colorado Avalanche Information Center (CAIC). It included avalanches in Alaska,...

February 09, 2021

semisopochnoi ash deposits landsat 8 2301z february 7 2021 f

Aviation Color Code for Semisopochnoi volcano raised to Orange, Alaska

A high-resolution satellite image acquired on February 7, 2021, shows a second small ash deposit extending at least 3 km (1.8 miles) to the northeast from North Cerberus Crater on Semisopochnoi Island, similar to the first observed on February 6. Clouds obscured...

February 09, 2021

semisopochnoi alaska feb 6 2021 f

Renewed unrest at Semisopochnoi, alerts raised, Alaska

High-resolution satellite imagery acquired on February 6, 2021, showed a small ash deposit extending less than 3 km (1.8 miles) to the north from North Cerebus Crater on Semisopochnoi Island, Alaska, U.S. Steam emissions obscured views into the crater, the Alaska...

February 07, 2021

goes west 1950z jan 5 2020 f

Powerful winter storms bring severe winds and snow to Alaska, Pacific Northwest and Canada

A powerful winter storm is set to blast Southeast Alaska with hurricane-force winds on Wednesday, January 6, 2021. New storms are expected to form in the days ahead, bringing severe winds, snow, and major waves to the region. An ongoing La Niña is resulting...

January 06, 2021

alaska earthquake january 3 2021 f

Shallow M6.1 earthquake hits Andreanof Islands, Alaska

A strong and shallow earthquake registered by the USGS as M6.1 hit the Andreanof Islands, U.S. at 12:38 UTC on January 3, 2021. The agency is reporting a depth of 17 km (10.5 miles). EMSC is reporting M6.1 at a depth of 48 km (30 miles). The epicenter was located...

January 03, 2021

extratropical storm dec 15 2020 6

Extratropical storm to bring severe winds, waves, and heavy precipitation to Southeast Alaska

An extratropical storm moving northeast across the North Pacific is forecast to bring major waves, strong winds, and heavy rains and snow to Southeast Alaska on Tuesday, December 15, 2020. The system has already generated significant wave heights that are being...

December 15, 2020

alaska volcanoes dec 10 2020

Six Alaskan volcanoes may be part of one massive supervolcano

Six stratovolcanoes comprising the Islands of Four Mountains in Alaska's central Aleutian Islands may not be separate volcanoes, but instead a part of one enormous volcanic caldera system, according to scientists who presented the evidence at the American...

December 10, 2020

haines landslide alaska dec 2 2020

Major landslide leaves at least 6 people missing in Haines, southeast Alaska

Six people went missing after a massive landslide, among many other smaller ones, hit the community of Haines in southeast Alaska following heavy rains, the Alaska State Troopers reported Wednesday, December 2, 2020. Up to 3 m (9 feet) of debris engulfed the area,...

December 03, 2020

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Shallow M6.3 earthquake hits Fox Islands, Alaska

A shallow earthquake registered by the USGS as M6.3 hit the Fox Islands, Alaska at 16:22 UTC on December 1, 2020, at a depth of 23 km (14.3 miles). EMSC is reporting M6.3 at a depth of 54 km (33 miles). The epicenter was located 40 km (25 miles) E of Nikolski,...

December 01, 2020

korovin volcano october 25 2020 f

Low-level seismicity continues at Korovin volcano, Alaska

Low-level seismicity continues at Korovin Volcano with no other signs of volcanic activity detected in infrasound sensors or partly cloudy satellite views, the Alaska Volcano Observatory (AVO) reported at 19:42 UTC on November 1, 2020. The last eruption at this...

November 02, 2020

korovin volcano july 27 2019

Korovin volcano alert level raised, Alaska

Increased seismicity and recent satellite detections of significant sulfur dioxide emissions forced the Alaska Volcano Observatory (AVO) to increase alert levels for Korovin volcano on October 28, 2020. The Aviation Color Code was raised to Yellow and Alert Level to...

October 28, 2020

alaska earthquake m7 5 october 19 2020 tsunami warning

Strong and shallow M7.5 earthquake hits south of Alaska, tsunami warning issued

A strong earthquake registered by the USGS as M7.5 hit south of Alaska at 20:54 UTC (12:54 LT) on October 19, 2020. The agency is reporting a depth of 40 km (25 miles). The epicenter was located 91.7 km (56.9 miles) SE of Sand Point (population 1 064) and 929.9 km...

October 19, 2020

barry arm landslide 2020

Massive, slumping mountainside in Barry Arm poses risk of catastrophic landslide and mega-tsunami, Alaska

A slow-moving landslide of an entire mountainside in Alaska's Barry Arm area may generate a mega-tsunami if the land suddenly collapses into the narrow fjord. Research findings show that the collapse would generate 11 times more energy and release 16 times more...

October 11, 2020

pavlof volcano alaska

Increased seismicity at Pavlof volcano, Alaska

Seismic activity at Pavlof volcano has increased on September 21, 2020, prompting the Alaska Volcano Observatory (AVO) to raise the Aviation Color Code to Yellow and Alert Level to Advisory. While this does not necessarily mean that an eruption is likely or...

September 22, 2020

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M6.1 aftershock hits near the coast of Alaska Peninsula, U.S.

A strong aftershock registered by the USGS as M6.1 hit near the coast of Alaska Peninsula, U.S. at 08:03 UTC on July 28, 2020, at a depth of 41.3 km (25.6 miles). This is yet another aftershock of powerful M7.8 earthquake that struck at 08:12 UTC on July 22. USGS...

July 28, 2020

alaska earthquake july 22 2020 f

Major M7.8 earthquake hits near the coast of Alaska Peninsula, U.S. -- tsunami warning issued

A very strong and shallow earthquake registered by the USGS as M7.8 hit near the coast of Alaska Peninsula, U.S. at 06:12 UTC on July 22, 2020 (19:12 LT, July 21). The agency is reporting a depth of 28 km (17.4 miles). EMSC registered it as M7.8 at a depth of 30 km...

July 22, 2020

makushin volcano june 7 2018

Increased earthquake activity at Makushin volcano, Alaska

The Alaska Volcano Observatory (AVO) is recording increased earthquake activity at Makushin volcano over the past 2 weeks. In response, the observatory raised the Aviation Color Code to Yellow on June 15 and plans to continue close monitoring of seismic activity,...

July 01, 2020

veniaminof september 21 2019 f

Alerts raised after increased seismicity under Veniaminof volcano, Alaska

Over the past several days there have been periods of seismic tremor and occasional earthquakes at Veniaminof volcano, forcing the Alaska Volcano Observatory (AVO) to raise the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. The volcano has a...

June 19, 2020

makushin hot springs january 22 2020 f

Alerts raised after significant earthquakes under Makushin volcano in Alaska, U.S.

Two earthquakes with magnitudes larger than 4.0 were registered in the vicinity of Makushin volcano, Alaska over the past 12 hours, representing a significant departure from background earthquake activity. The last eruption of this volcano took place in 2005 (VEI...

June 16, 2020

shishaldin sentinel 2 march 12 2020 swir f

Surface lava, elevated seismicity at Shishaldin volcano - Aviation Color Code raised to Orange, Alaska

A high-resolution satellite image today shows lava and what appears to be a new cone within the Shishaldin summit crater, prompting the Alaska Volcano Observatory to raise the Aviation Color Code to ORANGE and the Alert Level to WATCH at 06:31 UTC on March 15, 2020....

March 16, 2020

semisopochnoi february 27 2020 f

Continuous tremor at Semisopochnoi volcano, Aviation Color Code raised to Orange, Alaska

Seismicity has been increasing over the last few days at Semisopochnoi volcano, Alaska and now is characterized by nearly continuous tremor and frequent small explosion signals. The situation represents a significant increase in activity and the Alaska Volcano...

March 16, 2020

semisopochnoi dec 11 2019 sentinel 2 f

Series of small explosions and tremor bursts at Semisopochnoi volcano, alerts raised

A series of small explosions and tremor bursts have been detected in seismic data at Semisopochnoi over the past 7 hours and are continuing, representing a significant uptick in activity, the Alaska Volcano Observatory (AVO) reported at 09:19 UTC on February 15,...

February 15, 2020

rat islands earthquake jan 26 2020 f

Shallow M6.1 earthquake hits Andreanof Islands, Alaska

A strong and shallow earthquake registered by the USGS as M6.1 hit Andreanof Islands, Alaska at 06:31 UTC on January 26, 2020 (18:31 LT, January 25). The agency is reporting a depth of 27 km (16.7 miles). EMSC is reporting M6.0 at a depth of 48 km (29.8 miles). The...

January 26, 2020

tanaga island earthquake january 23 2020 f

Shallow M6.2 earthquake hits near Tanaga Volcano, Andreanof Islands, Alaska

A strong and shallow earthquake registered by the USGS as M6.2 hit near Tanaga Volcano, Andreanof Islands, Alaska at 05:53 UTC on January 23, 2020 (19:53 LT, January 22). The agency is reporting a depth of 10 km (6.2 miles). EMSC is reporting M6.3 at a depth of 10...

January 23, 2020

shishaldin january 19 2020 f

Eruption at Shishaldin volcano, Aviation Color Code raised to Red, Alaska

Starting at about 09:30 UTC (00:30 AKST) on January 19, 2020, the eruption at Shishaldin volcano in Alaska intensified, and about 13:30 UTC began generating a more ash-rich volcanic plume. The Aviation Color Code was raised to RED and the volcano Alert Level to...

January 19, 2020

shishaldin lava flow january 18 2020 f

Eruptive activity resumes at Shishaldin volcano, lava flows on the NE flank, Alaska

Eruptive activity at Shishaldin volcano resumed on January 18, 2020, with lava flows visible on the NE flank. The Aviation Color Code remains Orange and Alert Level Watch since January 7. A weak plume, possibly containing a small quantity of ash, is visible in...

January 19, 2020

shishaldin 3d january 7 2020 f

Strong eruption at Shishaldin ends, Aviation Color Code lowered to Orange, Alaska

Ash cloud produced by the strong eruption at Shishaldin volcano, Aleutian Islands, Alaska at 14:10 UTC on January 7, 2020, reached 10 km (33 000 feet) above sea level before midnight UTC. Volcanic ash tops were raised from previously reported 7.6 km (25 000 feet)...

January 08, 2020

shishaldin alaska january 7 2020 f

Eruption at Shishaldin intensifies, Aviation Color Code raised to Red, Alaska

Ash eruption at Shishaldin continues and has intensified as shown in satellite and lightning data, the Alaska Volcano Observatory (AVO) reported at 21:33 UTC on January 7, 2020. Satellite data suggest the ash cloud is as high as 8.2 km (27 000 feet) above sea level...

January 07, 2020

shishaldin volcano january 2 2019 f

Eruption at Shishaldin volcano, ash cloud to 7.3 km (24 000 feet) a.s.l., Alaska

A new eruption is taking place at Shishaldin volcano, Alaska on January 3, 2020, with ash cloud rising to 6 - 7.3 km (20 000 - 24 000 feet) above sea level at 21:00 UTC, drifting E-SE. According to Alaska Volcano Observatory, the level of seismicity has increased to...

January 03, 2020

pavlof alaska august 2019 f

Increased seismicity, alerts raised for Pavlof volcano, Alaska

Seismic activity at Pavlof volcano, Alaska has increased over the past several days, forcing the Alaska Volcano Observatory to raise the Alert Level to Advisory and the Aviation Color Code to Yellow at 20:43 UTC on December 28, 2019. Pavlof is a snow- and...

December 28, 2019

shishaldin december 26 2019 sentinel 2 f

Sentinel-2 provides evidence of increasing eruptive activity at Mt. Shishaldin, Alaska

The eruption of Shishaldin Volcano that began in late July continues with low-level explosive activity near the summit and effusion of short lava flows, tha Alaska Volcano Observatory (AVO) reports. Elevated seismicity and surface temperatures were recorded...

December 28, 2019

shishaldin november 1 2019 2

Short-lived explosion at Shishaldin, heightened level of unrest, Alaska

A short-lived explosion occurred at Shishaldin volcano, Alaska, U.S. at 16:10 UTC (07:10 LT) on December 12, 2019. The eruption lasted about 3 minutes and produced an ash cloud up to 6 - 7.6 km (20 000 - 25 000 feet) above sea level, moving W-NW at 83 km/h (52 mph)....

December 12, 2019

mt cerberus semisopochnoi may 2017 f

Eruption detected at Semisopochnoi volcano, Alaska

An eruption signature was detected at Semisopochnoi as strong tremor on local seismic and in regional infrasound networks on Adak Island, Alaska Volcano Observatory reported at 10:25 UTC on December 7, 2019. The event started at 09:26 UTC (00:26 AKST) on December 7...

December 07, 2019

shishaldin november 11 2019 alaska by anamaria luongo f

Significant increase of activity at Shishaldin volcano, fire-fountaining observed, Alaska

Activity at Shishaldin has increased significantly over the past day with fire-fountaining observed in web camera views throughout the evening and night, the Alaska Volcano Observatory (AVO) reported at 22:20 UTC on November 11, 2019. Strongly elevated surface...

November 12, 2019

cleveland volcano april 27 2019

Lava effusion detected at Cleveland volcano, Aviation Color Code raised to Orange, Alaska

Satellite data from the past day suggest that slow effusion of lava may have begun in the summit crater. Thus, the Alaska Volcano Observatory (AVO) is increasing the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH on November 8, 2019. Highly...

November 08, 2019