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Mag. 1.4 quake - Matanuska-Susitna Parish, Alaska, USA, on Saturday, Sep 23, 2023 06:38 am (Anchorage time) -

Minor magnitude 1.4 earthquake at 15 km depth

23 Sep 14:40 UTC: First to report: USGS after 2 minutes.

Earthquake details

Date & time	Sep 23, 2023 14:38:03 UTC -
Local time at epicenter	Saturday, Sep 23, 2023 06:38 am (America/Anchorage GMT -8)
Status	Confirmed
Magnitude	1.4
Depth	14.7 km
Epicenter latitude / longitude	62.1835°N / 150.0988°W Matanuska-Susitna, Alaska, United States
Antipode	62.1835°S / 29.9012°E
Shaking intensity	Not felt
Felt
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Hayes (138 km / 86 mi)
Weather at epicenter at time of quake	Overcast Clouds 2.1°C (36 F), humidity: 93%, wind: 0 m/s (0 kts)
Estimated seismic energy released	7.9 x 10⁶ joules (2.21 kilowatt hours) \| about seismic energy

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Nearby places

Distance	Place	Max. shaking intensity(*)	Region	Country
13 km (8 mi) E of epicenter	Susitna North (pop: 1,260)	Not felt	Matanuska-Susitna, Alaska	United States
49 km (30 mi) S of epicenter	Willow Creek (pop: 2,100)	Not felt	Matanuska-Susitna, Alaska	United States
67 km (41 mi) SE of epicenter	Fishhook (pop: 4,680)	Not felt	Matanuska-Susitna, Alaska	United States
75 km (47 mi) SSE of epicenter	Wasilla (pop: 9,280)	Not felt	Matanuska-Susitna, Alaska	United States
79 km (49 mi) SSE of epicenter	Knik-Fairview (pop: 14,900)	Not felt	Matanuska-Susitna, Alaska	United States
83 km (52 mi) SE of epicenter	Palmer (pop: 6,790)	Not felt	Matanuska-Susitna, Alaska	United States
100 km (62 mi) SSE of epicenter	Eagle River (pop: 24,800)	Not felt	Anchorage, Alaska	United States
100 km (62 mi) SSE of epicenter	Eagle River (pop: 24,800)	Not felt	Anchorage Municipality, Alaska	United States

Notes:
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

Compare Quake Data

Data for the same earthquake as reported by different agencies

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	Time GMT	Epicenter	Agency
1.4	15 km (9.1 mi)	2023-09-23 14:38:03	13 Km W of Susitna North, Alaska	USGS (United States Geological Survey)
1.4	15 km (9.1 mi)	2023-09-23 14:38:03	Central Alaska 0 km (0 mi) epicenter difference with USGS	RaspberryShake (RaspberryShake)
1.4	10 km (6.2 mi) (*)	2023-09-23 14:38:03	Central Alaska 0 km (0 mi) epicenter difference with USGS	IRIS (Incorporated Research Institutions for Seismology)

Notes:
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.

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

Seismograms

Seismic station: Chulitna, AK, USA (CUT/AK network) | Distance from quake: 26 km / 16 mi | Show on map | Station Info

Seismic station Chulitna, AK, 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: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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

Seismic station Chulitna, AK, USA: 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: Petersville, AK, USA (L22K/AK network) | Distance from quake: 51 km / 32 mi | Show on map | Station Info

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

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

Seismic station Petersville, 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

Seismic station: Gloryhole, AK, USA (GHO/AK network) | Distance from quake: 77 km / 48 mi | Show on map | Station Info

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

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

Seismic station Gloryhole, 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

Seismic station: Susitna Watana 7, AK, USA (WAT7/AK network) | Distance from quake: 97 km / 60 mi | Show on map | Station Info

Seismic station Susitna Watana 7, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Susitna Watana 7, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Susitna Watana 7, 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

Seismic station: Fire Island, AK, USA (FIRE/AK network) | Distance from quake: 116 km / 72 mi | Show on map | Station Info

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

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

Seismic station Fire Island, 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 1.4, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

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