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Random pictures
News
Seismic signal from Semisopochnoi volcano as recorded on Adak Island (image: AVO)
Thursday, Feb 20, 2020
The Alaska Volcano Observatory (AVO) reported that the seismic unrest continues at the volcano with intermittent, low-level tremor. Tremor bursts lasting from three to twelve minutes every few hours. ... [more]
Sunday, Feb 16, 2020
The Alaskan Volcano Observatory (AVO) raised the Aviation Colour Code and Alert Level for Semisopochnoi to ORANGE/WATCH due to a significant increase in seismic activity as well as small explosions and tremor bursts, lasting from three to twelve minutes every few hours. No ash plumes have been observed. [more]
 

Semisopochnoi volcano

Stratovolcano 1221 m / 4,006 ft, United States, Aleutian Islands, 51.93°N / 179.58°E
Nearby recent earthquakes (within 30km radius):

Earthquake list: past 7 days (only M>=-0.8) (3 quakes)

Jump to quake statistics
 | archive: show
Earthquake depth plot Updated: Sun, 23 Feb 02:21 UTC (GMT)
TimeMag. / DepthDistanceLocationMapSource
Fri, 21 Feb 2020
Fri, 21 Feb 13:20 UTCM 1.1 / 13 km - [info]Semisopochnoi (4 km) - United States, Aleutian Islands 6km SSW of Semisopochnoi Island, Alaska (USA)
[Map]
USGS
Fri, 21 Feb 02:51 UTCM 1.5 / 13.6 km - [info]Semisopochnoi (4 km) - United States, Aleutian Islands 5km SSE of Semisopochnoi Island, Alaska (USA)
[Map]
USGS
Thu, 20 Feb 2020
Thu, 20 Feb 22:23 UTCM 1.3 / 10.5 km - [info]Semisopochnoi (5 km) - United States, Aleutian Islands 4km SE of Semisopochnoi Island, Alaska (USA)
[Map]
USGS
Estimated combined seismic energy released: 2*10^7 J (5.46 KWh) [learn more]

Earthquake statistics

Number of earthquakes vs time:

Past 24 hrs:
Number of quakes and energy past 24 hours
Past 30 days:
Number of quakes and energy past 30 days
Past 90 days:
Number of quakes vs time
Magnitude distribution and energy released:
Past 24 hrs:
Number of quakes and energy vs magnitude past 24 hrs Magnitudes of quakes and energy vs time past 24 hrs
Past 7 days:
Number of quakes and energy vs magnitude past 7 days Magnitudes of quakes and energy vs time past 7 days
Past 30 days:
Number of quakes and energy vs magnitude past 30 days Magnitudes of quakes and energy vs time past 30 days
 

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