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Minor mag. 0.7 earthquake - 88 Km NNW of Karluk, Alaska, on Saturday, Mar 18, 2023 at 10:41 pm (GMT -8) -

Minor magnitude 0.7 earthquake at 1 km depth

19 Mar 06:44 UTC: First to report: USGS after 2 minutes.

Earthquake details

Date & time	Mar 19, 2023 06:41:45 UTC -
Local time at epicenter	Saturday, Mar 18, 2023 at 10:41 pm (GMT -8)
Status	Confirmed
Magnitude	0.7
Depth	0.5 km
Epicenter latitude / longitude	58.2523°N / 155.2113°W (Alaska, United States)
Antipode	58.252°S / 24.789°E
Shaking intensity	Not felt
Felt
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Novarupta (4 km / 2 mi)
Nearby towns and cities	88 km (55 mi) NNW of Karluk (pop: 37) \| Show on map \| Quakes nearby 97 km (60 mi) ESE of King Salmon (pop: 374) \| Show on map \| Quakes nearby 108 km (67 mi) NW of Larsen Bay (pop: 88) \| Show on map \| Quakes nearby 135 km (84 mi) SE of Levelock (pop: 69) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Snow -9°C (16 F), humidity: 96%, wind: 2 m/s (4 kts) from WSW
Estimated seismic energy released	7.1 x 10⁵ joules (0.197 kilowatt hours) \| 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
0.7	0.5 km	88 Km NNW of Karluk, Alaska	USGS
0.7	0.5 km	Alaska Peninsula	RaspberryShake
0.7	10 km	Alaska Peninsula	IRIS

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

Seismograms

Seismic station: Katmai Baked Mountain, Alaska (KBM/AV network) | Distance from quake: 2 km / 2 mi | Show on map | Station Info

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

Seismic station Katmai Baked Mountain, 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: KABU - Katmai Volcanic Cluster, Alaska (KABU/AV network) | Distance from quake: 5 km / 3 mi | Show on map | Station Info

Seismic station KABU - Katmai Volcanic Cluster, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station KABU - Katmai Volcanic Cluster, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station KABU - Katmai Volcanic Cluster, 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: Angle Creek Headwaters, Katmai, Alaska (ACH/AV network) | Distance from quake: 8 km / 5 mi | Show on map | Station Info

Seismic station Angle Creek Headwaters, Katmai, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Angle Creek Headwaters, Katmai, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Angle Creek Headwaters, Katmai, 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: KAKN - Katmai Volcanic Cluster, Alaska (KAKN/AV network) | Distance from quake: 10 km / 6 mi | Show on map | Station Info

Seismic station KAKN - Katmai Volcanic Cluster, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station KAKN - Katmai Volcanic Cluster, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station KAKN - Katmai Volcanic Cluster, 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: Katnai Ventifact, Alaska (KAVE/AV network) | Distance from quake: 13 km / 8 mi | Show on map | Station Info

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

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

Seismic station Katnai Ventifact, 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

User reports for this quake

At magnitude 0.7, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

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