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Moderate mag. 4.2 earthquake - Bering Sea, 49 mi southwest of Attu Station, Aleutians West, Alaska, USA, on Saturday, Mar 18, 2023 at 8:04 am (GMT -9) -

Moderate mag. 4.2 earthquake - Bering Sea, 49 mi southwest of Attu Station, Aleutians West, Alaska, USA, on Saturday, Mar 18, 2023 at 8:04 am (GMT -9) Moderate mag. 4.2 earthquake - Bering Sea, 49 mi southwest of Attu Station, Aleutians West, Alaska, USA, on Saturday, Mar 18, 2023 at 8:04 am (GMT -9)

Moderate magnitude 4.2 earthquake at 10 km depth

18 Mar 19:00 UTC: First to report: USGS after 1 hour and 55 minutes.

Earthquake details

Date & timeMar 18, 2023 17:04:54 UTC -
Local time at epicenterSaturday, Mar 18, 2023 at 8:04 am (GMT -9)
Depth10.0 km
Epicenter latitude / longitude52.2135°N / 172.6814°E (Bering Sea, Alaska, United States)
Antipode52.214°S / 7.319°W
Shaking intensityLight shaking near epicenter
Felt0 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoBuldir (220 km / 137 mi)
Nearby towns and cities78 km (49 mi) SSW of Attu Station (pop: 21) | Show on map | Quakes nearby
Estimated seismic energy released1.3 x 1011 joules (35 megawatt hours, equivalent to 30.1 tons of TNT) | about seismic energy
Show interactive Map
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
4.210 km78 Km SSW of Attu Station, AlaskaUSGS
4.210 kmNear Islands, Aleutian IslandsRaspberryShake
4.210 kmNear Islands, Aleutian IslandsIRIS


Seismic station: Shemya Island, Alaska, USA (SHEM/IM network) | Distance from quake: 112 km / 70 mi | Show on map | Station Info
Seismic station Shemya Island, Alaska, USA: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Earlier earthquakes in the same area

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