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Mag. 1.4 quake - Chugach Parish, Alaska, USA, on Friday, Sep 22, 2023 11:44 pm (Anchorage time) -

Mag. 1.4 quake - Chugach Parish, Alaska, USA, on Friday, Sep 22, 2023 11:44 pm (Anchorage time) Mag. 1.4 quake - Chugach Parish, Alaska, USA, on Friday, Sep 22, 2023 11:44 pm (Anchorage time)

Minor magnitude 1.4 earthquake at 9 km depth

23 Sep 07:46 UTC: First to report: USGS after 2 minutes.

Earthquake details

Date & timeSep 23, 2023 07:44:52 UTC -
Local time at epicenterFriday, Sep 22, 2023 11:44 pm (America/Anchorage GMT -8)
Depth9.4 km
Epicenter latitude / longitude61.1712°N / 146.8258°W Chugach, Alaska, United States
Antipode61.1712°S / 33.1742°E
Shaking intensityNot felt
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoWrangell (175 km / 109 mi)
Weather at epicenter at time of quakeOvercast Clouds 2.1°C (36 F), humidity: 71%, wind: 4 m/s (7 kts)
Estimated seismic energy released7.9 x 106 joules (2.21 kilowatt hours) | about seismic energy
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Nearby places

Distance Place Max. shaking intensity(*) Region Country
26 km (16 mi)
E of epicenter
(pop: 3,870)
Not felt
35 km (22 mi)
SSE of epicenter
(pop: 88)
Not felt
Valdez-Cordova, Alaska
83 km (52 mi)
NNW of epicenter
Glacier View
(pop: 234)
Not felt
Matanuska-Susitna, Alaska
87 km (54 mi)
NNW of epicenter
Eureka Roadhouse
(pop: 29)
Not felt
Matanuska-Susitna, Alaska
91 km (56 mi)
SE of epicenter
(pop: 2,200)
Not felt
Chugach, Alaska
91 km (57 mi)
N of epicenter
(pop: 59)
Not felt
Valdez-Cordova, Alaska
111 km (69 mi)
NW of epicenter
(pop: 272)
Not felt
Matanuska-Susitna, Alaska
120 km (74 mi)
NE of epicenter
Copper Center
(pop: 328)
Not felt
Valdez-Cordova, Alaska
(*) 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 9.4 km (5.8 mi) 2023-09-23 07:44:52 26 Km W of Valdez, Alaska USGS (United States Geological Survey)
1.4 9.4 km (5.8 mi) 2023-09-23 07:44:52 Southern Alaska
0 km (0 mi) epicenter difference with USGS
RaspberryShake (RaspberryShake)
1.4 10 km (6.2 mi) (*) 2023-09-23 07:44:52 Southern Alaska
0 km (0 mi) epicenter difference with USGS
IRIS (Incorporated Research Institutions for Seismology)
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.


Seismic station: Valdez Marine Terminal, AK, USA (VMT/AK network) | Distance from quake: 26 km / 16 mi | Show on map | Station Info
Seismic station Valdez Marine Terminal, 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 1.4, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.
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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