Articles tagged "alaska"

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

shishaldin november 1 2019 f

Eruption at Shishaldin continues, lava flowing beyond the summit crater, Alaska

Low-level eruptive activity continues at Shishaldin Volcano. Two stalled lava flows extend beyond the summit crater up to 1.8 km (1.1 miles) down the northwest flank, and satellite data show trace ash deposits on the north flank and a lahar extending at least 4 km...

November 03, 2019

shishadin october 21 2019

Lava flows, large lahar at Shishaldin volcano, Alaska

Satellite data from the past day show that lava now fills the Shishaldin's summit crater and is beginning to flow over the northern crater rim in two locations, the Alaska Volcano Observatory reported at 20:07 UTC on October 24, 2019. One 200 m (600 feet) long...

October 25, 2019

pavlof july 22 2019

Small explosion signals at Pavlof volcano, alerts raised, Alaska

Small explosion signals from Pavlof volcano have been detected on the infrasound network located at Sand Point and on the local seismic network on October 19, 2019. It is unknown if the explosions produced any volcanic ash, but their small size suggests any hazard...

October 20, 2019

veniaminof june 29 2019 f

Veniaminof volcano alerts raised, Alaska

The Alaska Volcano Observatory (AVO) raised alerts for Veniaminof volcano after pilot reports of steaming coincided with low-level tremor recorded at the volcano at 20:30 UTC (12:30 AKDT). These observations mark a departure from recent background activity - the...

August 02, 2019

lava lake shishaldin july 23 2019 f

Active lava lake at Shishaldin volcano, Aviation Color Code Orange, Alaska

The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code from Yellow to Orange and the Alert Level from Advisory to Watch at Shishaldin volcano on July 24, 2019. The last eruption of this volcano took place in 2015 (VEI 1). Field crews reported an...

July 24, 2019

mt cerberus semisopochnoi alaska 2017

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

Elevated seismicity that began under Semisopochnoi volcano, Alaska on July 17, 2019, increased overnight and was followed by a stronger tremor signal recorded at 07:39 UTC, July 18. In addition, an infrasound signal was produced on an infrasound array located 260 km...

July 18, 2019

shishaldin 2018 f

Increased seismicity, alerts raised for Shishaldin volcano, Alaska

The Alaska Volcano Observatory is raising the Aviation Color Code to YELLOW and the Alert Level to ADVISORY at Shishaldin Volcano, the observatory said 21:09 UTC on July 12, 2019. The last eruption of this volcano took place in 2015 (VEI 1). This change is based on...

July 12, 2019

july 4 2019 850hpa ta na

Anchorage breaks all-time high temperature record, Alaska

Temperatures in Anchorage, Alaska rose up to 32 °C (90 °F) on July 4, 2019, breaking the previous all-time record temperature for the city of 29.4 °C (85 °F) set in 1969. The city also broke its daily July 4 record of 25 °C (77 °F) set in...

July 05, 2019

semisopochnoi island may 2017 f

Increased seismicity, alerts raised at Semisopochnoi volcano, Aleutians

Due to an increase in seismicity above background levels over at least the last 8 hours AVO is raising the Aviation Color Code to YELLOW and Alert Level to ADVISORY at Semisopochnoi. No explosive activity has been detected on the Adak infrasound array and clouds...

July 05, 2019

iliamna landslide june 21 2019 f

Large landslide on the flanks of Iliamna volcano, Alaska

A very large landslide took place on the flanks of Iliamna volcano, Alaska at about 00:05 UTC on June 21, 2019. The slide is about 6 km (3.7 miles) in length and appears to be originating near the summit. The debris field is approximately 3.2+ km (2+ miles) wide....

June 27, 2019

great sitkin april 27 2019 f

Steam explosion at Great Sitkin volcano, alerts raised, Alaska

A small steam explosion at 05:40 UTC on June 2, 2019 (21:40 AKDT June 1) was detected at Great Sitkin volcano in local seismic data, the Alaska Volcano Observatory reports. No corresponding signal was seen in regional infrasound data or cloudy satellite...

June 02, 2019

alaska earthquake may 23 2019 f

Shallow M6.1 earthquake hits Andreanof Islands, Alaska

A strong and shallow earthquake registered by the USGS as M6.1 hit off the coast of Amatignak Island, Alaska at 08:45 UTC on May 23, 2019. The agency is reporting a depth of 27.8 km (17.3 miles). EMSC is reporting M6.1 at a depth of 56 km (34.8 miles). The epicenter...

May 23, 2019

pavlof volcano january 19 2019

Vigorous steam plume at Pavlof volcano, alerts raised, Alaska

Low-frequency seismic tremor and vigorous steam plume have been observed at Pavlof volcano, Alaska over the past 2 days, forcing the Alaska Volcano Observatory (AVO) to raise the Aviation Color Code and Alert Level to Yellow/Advisory on May 15, 2019. The...

May 16, 2019

rat islands earthquakes april 2 and 3 2019 f

Shallow M6.5 earthquake, strong aftershocks hit Rat Islands, Aleutian Islands, Alaska

A strong and shallow earthquake registered by the USGS as M6.5 hit Rat Island, Aleutian Islands, Alaska at 21:35 UTC on April 2, 2019. The agency is reporting a depth of 19.1 km (11.8 miles). EMSC is reporting M6.5 at a depth of 10 km (6.2 miles). The quake was...

April 03, 2019

cleveland volcano june 30 2018 f

New lava dome observed in the summit crater of Cleveland volcano, alerts raised

A new lava dome was observed in the summit crater of Cleveland volcano prompting the Alaska Volcano Observatory to upgrade the Color Code/Alert Level to ORANGE/WATCH on January 17, 2019. No explosive activity has been detected or observed in seismic or infrasound...

January 18, 2019

alaska earthquake december 31 2018 f2

Shallow M6.1 earthquake hits off the coast of Cold Bay, Alaska

A strong and shallow earthquake registered by the USGS as M6.1 hit off the coast of Cold Bay, Alaska at 02:35 UTC on December 31, 2018. The agency is reporting a depth of 26.9 km (18.4 miles). EMSC is reporting M6.1 at a depth of 40 km (24.8 miles). This earthquake...

December 31, 2018

cleveland volcano july 10 2018 f

Short-lived explosion at Cleveland volcano, ash to 5.2 km (17 000 feet), Alaska

A short-lived explosion was detected at Cleveland volcano early December 29, 2018. Ash cloud was reported rising up to 5.2 km (17 000 feet) above sea level. The Aviation Color Code remains Orange since December 12. Local seismic sensors recorded a short-lived...

December 29, 2018

veniaminof eruption november 21 2018 suomi npp

Significant increase in ash emissions at Veniaminof, Aviation Color Code Red, Alaska

Ash emissions at Veniaminof volcano increased significantly on November 21, 2018, forcing Alaska Volcano Observatory to raise the Aviation Color Code to Red and Volcano Alert Level to Warning. Veniaminof is generating a plume of ash up to 4.6 km (15 000 feet) above...

November 22, 2018

semisopochnoi island september 10 2018 esa sentinel 2 f

Eruptive events detected at Semisopochnoi, alerts raised to Orange/Watch, Alaska

Strong seismic tremor consistent with an eruption was recorded at Semisopochnoi volcano starting at 04:47 UTC (20:47 AKDT) on October 26, 2018. Satellite data through 05:00 UTC showed a small ash cloud at about 3.6 km (12 000 feet) above sea level, the Alaska...

October 28, 2018

veniaminof volcano 19 12 utc september 4 2018

Veniaminof volcano alert levels raised, the last eruption of this volcano took place in 2013, Alaska

The Alaska Volcano Observatory (AVO) has raised the Aviation Color Code to Orange and the Volcano Alert Level to Watch for Veniaminof volcano at 21:29 UTC on September 4, 2018. The last known eruption of this volcano took place in 2013. The decision to raise alerts...

September 05, 2018

fox islands m6 0 earthquake august 25 2018 f

Shallow M6.0 earthquake hit Fox Islands, Aleutian Islands, Alaska

A strong and shallow earthquake registered by the USGS as M6.0 hit Fox Islands, Aleutian Islands, Alaska at 16:50 UTC (07:50 local time) on August 25, 2018. The agency is reporting a depth of 35.1 km (21.8 miles). EMSC is reporting M5.9 at a depth of 40 km (24.8...

August 25, 2018