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Mag. 2.5 quake - 58 mi northwest of Willow Creek, Matanuska-Susitna, Alaska, USA, on Friday, Sep 22, 2023 09:29 pm (Anchorage time) -

Mag. 2.5 quake - 58 mi northwest of Willow Creek, Matanuska-Susitna, Alaska, USA, on Friday, Sep 22, 2023 09:29 pm (Anchorage time) Mag. 2.5 quake - 58 mi northwest of Willow Creek, Matanuska-Susitna, Alaska, USA, on Friday, Sep 22, 2023 09:29 pm (Anchorage time)

Minor magnitude 2.5 earthquake at 87 km depth

23 Sep 05:31 UTC: First to report: USGS after 2 minutes.

Earthquake details

Date & timeSep 23, 2023 05:29:26 UTC -
Local time at epicenterFriday, Sep 22, 2023 09:29 pm (America/Anchorage GMT -8)
StatusConfirmed
Magnitude2.5
Depth87.1 km
Epicenter latitude / longitude62.4206°N / 151.1023°W Matanuska-Susitna, Alaska, United States
Antipode62.4206°S / 28.8977°E
Shaking intensityNot felt
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoHayes (114 km / 71 mi)
Weather at epicenter at time of quakeBroken Clouds 4.2°C (40 F), humidity: 73%, wind: 1 m/s (1 kts) from N
Estimated seismic energy released3.5 x 108 joules (98.6 kilowatt hours) | about seismic energy
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Nearby places

Distance Place Max. shaking intensity(*) Region Country
46 km (29 mi)
ESE of epicenter
Trapper Creek
(pop: 481)
Not felt
Matanuska-Susitna, Alaska
71 km (44 mi)
ESE of epicenter
Susitna North
(pop: 1,260)
Not felt
Matanuska-Susitna, Alaska
93 km (58 mi)
SE of epicenter
Willow Creek
(pop: 2,100)
Not felt
Matanuska-Susitna, Alaska
111 km (69 mi)
SE of epicenter
Houston
(pop: 2,210)
Not felt
Matanuska-Susitna, Alaska
117 km (72 mi)
SSE of epicenter
Big Lake
(pop: 3,350)
Not felt
Matanuska-Susitna, Alaska
123 km (76 mi)
SE of epicenter
Fishhook
(pop: 4,680)
Not felt
Matanuska-Susitna, Alaska
127 km (79 mi)
SE of epicenter
Wasilla
(pop: 9,280)
Not felt
Matanuska-Susitna, Alaska
130 km (81 mi)
SE of epicenter
Lakes
(pop: 8,360)
Not felt
Matanuska-Susitna, Alaska
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
2.5 87 km (54 mi) 2023-09-23 05:29:26 19 Km WSW of Petersville, Alaska USGS (United States Geological Survey)
2.5 87 km (54 mi) 2023-09-23 05:29:26 Central Alaska
0 km (0 mi) epicenter difference with USGS
RaspberryShake (RaspberryShake)
2.5 10 km (6.2 mi) (*) 2023-09-23 05:29:26 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.

Seismograms

Seismic station: Petersville, AK, USA (L22K/AK network) | Distance from quake: 21 km / 13 mi | Show on map | Station Info
Seismic station Petersville, 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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User-reports for this quake

At magnitude 2.5, 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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