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Minor mag. 2.9 earthquake - 40 mi west of Kalifornsky, Kenai Peninsula, Alaska, USA, on Monday, Jan 18, 2021 at 8:21 am (GMT -9)

Minor magnitude 2.9 earthquake at 101 km depth

18 Jan 17:25 UTC: First to report: USGS after 4 minutes.
18 Jan 17:26: Hypocenter depth recalculated from 100.9 to 101.6 km (from 63 to 63 mi). Epicenter location corrected by 1.5 km (0.9 mi) towards WNW.
18 Jan 17:32: Magnitude recalculated from 3.0 to 2.9. Hypocenter depth recalculated from 101.6 to 101.2 km (from 63 to 63 mi).

Update Mon, 18 Jan 2021, 17:30

Magnitude 3.0 earthquake strikes near Kalifornsky, Kenai Peninsula County, Alaska, United States

3.0 quake 18 Jan 8:21 am (GMT -9)

A magnitude 3.0 earthquake near Kalifornsky, Kenai Peninsula County, Alaska, USA, was reported only 9 minutes ago by the United States Geological Survey (USGS), considered the key international and national agency that monitors seismic activity in the US. The earthquake occurred at an intermediate depth of 63 miles beneath the epicenter in the morning on Monday 18 January 2021 at 8:21 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.0 as well.
According to preliminary calculations, we do not expect that the quake was felt by many people and did not cause any damage. In Munina (pop. 880, 33 miles away), Cohoe (pop. 1,400, 39 miles away), Kalifornsky (pop. 7,900, 40 miles away), Kenai (pop. 7,700, 43 miles away), Anchor Point (pop. 1,900, 45 miles away), and Nikiski (pop. 4,500, 46 miles away), the quake was probably not felt.

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Earthquake details

Date & time	Jan 18, 2021 17:21:19 UTC
Local time at epicenter	Monday, Jan 18, 2021 at 8:21 am (GMT -9)
Status	Confirmed
Magnitude	2.9
Depth	101.2 km
Epicenter latitude / longitude	60.3482°N / 152.4474°W (Kenai Peninsula, Alaska, United States)
Antipode	60.348°S / 27.553°E
Shaking intensity	Not felt
Felt
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Redoubt (22 km / 14 mi)
Nearby towns and cities	54 km (34 mi) NW of Ninilchik (pop: 883) \| Show on map \| Quakes nearby 60 km (37 mi) NW of Happy Valley (pop: 593) \| Show on map \| Quakes nearby 64 km (40 mi) W of Kalifornsky (pop: 7,850) \| Show on map \| Quakes nearby 69 km (43 mi) WSW of Kenai (pop: 7,660) \| Show on map \| Quakes nearby 72 km (45 mi) NNW of Anchor Point (pop: 1,930) \| Show on map \| Quakes nearby 74 km (46 mi) WSW of Nikiski (pop: 4,490) \| Show on map \| Quakes nearby 78 km (48 mi) W of Soldotna (pop: 4,540) \| Show on map \| Quakes nearby 93 km (58 mi) NNW of Homer (pop: 5,520) \| Show on map \| Quakes nearby 93 km (58 mi) NW of Fritz Creek (pop: 1,930) \| Show on map \| Quakes nearby 95 km (59 mi) WSW of Sterling (pop: 5,620) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Snow 1.5°C (35 F), humidity: 86%, wind: 13 m/s (26 kts) from NNE
Estimated seismic energy released	1.4 x 10⁹ joules (392 kilowatt hours, equivalent to 0.338 tons of TNT) \| about seismic energy

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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.

Mag.	Depth	Location	Source
2.9	101 km	54 Km NW of Ninilchik, Alaska, USA	USGS
3.0	102 km	SOUTHERN ALASKA, USA	EMSC

Most recent quakes Top 20 past 24 hrs Quakes in the US Alaska

Seismograms

Seismic station: Redoubt Volcano, Redoubt Volcano, Alaska (RED/AV network) | Distance from quake: 20 km / 12 mi | Show on map | Station Info

Seismic station Redoubt Volcano, Redoubt Volcano, Alaska: 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: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Redoubt Volcano, Redoubt Volcano, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Redoubt Volcano, Redoubt Volcano, Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: North Crescent, Redoubt Volcano, Alaska (NCT/AV network) | Distance from quake: 36 km / 22 mi | Show on map | Station Info

Seismic station North Crescent, Redoubt Volcano, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station North Crescent, Redoubt Volcano, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station North Crescent, Redoubt Volcano, Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Iliamna Volcano, Alaska (ILCB/AV network) | Distance from quake: 67 km / 41 mi | Show on map | Station Info

Seismic station Iliamna Volcano, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Iliamna Volcano, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Iliamna Volcano, Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Augustine South Buttress, Augustine Volcano, Alaska (AUSB/AV network) | Distance from quake: 125 km / 78 mi | Show on map | Station Info

Seismic station Augustine South Buttress, Augustine Volcano, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Augustine South Buttress, Augustine Volcano, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Augustine South Buttress, Augustine Volcano, Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Knik Glacier, AK, USA (KNK/AK network) | Distance from quake: 246 km / 153 mi | Show on map | Station Info

Seismic station Knik Glacier, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Knik Glacier, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Knik Glacier, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

At magnitude 2.9, this quake might have been felt very close to the epicenter and under calm conditions.

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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