Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Mag. 0.9 quake - Matanuska-Susitna Parish, Alaska, USA, on Saturday, Sep 23, 2023 03:17 am (Anchorage time) -

Minor magnitude 0.9 earthquake at 34 km depth

23 Sep 11:20 UTC: First to report: RaspberryShake after 3 minutes.
23 Sep 11:28: Now using data updates from USGS

Earthquake details

Date & time	Sep 23, 2023 11:17:30 UTC -
Local time at epicenter	Saturday, Sep 23, 2023 03:17 am (America/Anchorage GMT -8)
Status	Confirmed
Magnitude	0.9
Depth	34.0 km
Epicenter latitude / longitude	62.0355°N / 147.8024°W Matanuska-Susitna, Alaska, United States
Antipode	62.0355°S / 32.1976°E
Shaking intensity	Not felt
Felt
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Wrangell (197 km / 122 mi)
Weather at epicenter at time of quake	Overcast Clouds -3.3°C (26 F), humidity: 89%, wind: 1 m/s (2 kts) from WSW
Estimated seismic energy released	1.4 x 10⁶ joules (0.392 kilowatt hours) \| about seismic energy

Show interactive Map

[smaller] [bigger]

Nearby places

Distance	Place	Max. shaking intensity(*)	Region	Country
26 km (16 mi) SSE of epicenter	Glacier View (pop: 234)	Not felt	Matanuska-Susitna, Alaska	United States
58 km (36 mi) WSW of epicenter	Sutton-Alpine (pop: 1,450)	Not felt	Matanuska-Susitna, Alaska	United States
82 km (51 mi) WSW of epicenter	Fishhook (pop: 4,680)	Not felt	Matanuska-Susitna, Alaska	United States
84 km (52 mi) SW of epicenter	Palmer (pop: 6,790)	Not felt	Matanuska-Susitna, Alaska	United States
92 km (57 mi) WSW of epicenter	Lakes (pop: 8,360)	Not felt	Matanuska-Susitna, Alaska	United States
111 km (69 mi) WSW of epicenter	Knik-Fairview (pop: 14,900)	Not felt	Matanuska-Susitna, Alaska	United States
122 km (76 mi) SW of epicenter	Eagle River (pop: 24,800)	Not felt	Anchorage, Alaska	United States
122 km (76 mi) SW 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
0.9	34 km (21 mi)	2023-09-23 11:17:30	26 Km NNW of Glacier View, Alaska	USGS (United States Geological Survey)
0.9	10 km (6.2 mi) (*)	2023-09-23 11:17:30	Central Alaska 0 km (0 mi) epicenter difference with USGS	IRIS (Incorporated Research Institutions for Seismology)
0.9	34 km (21 mi)	2023-09-23 11:17:30	Central Alaska 0 km (0 mi) epicenter difference with USGS	RaspberryShake (RaspberryShake)

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: Glacier View, AK, USA (M23K/AK network) | Distance from quake: 27 km / 17 mi | Show on map | Station Info

Seismic station Glacier View, 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

Show less

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

Seismic station Glacier View, 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: Sheep Mountain, AK, USA (SCM/AK network) | Distance from quake: 34 km / 21 mi | Show on map | Station Info

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

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

Seismic station Sheep Mountain, 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: Sawmill, AK, USA (SAW/AK network) | Distance from quake: 38 km / 23 mi | Show on map | Station Info

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

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

Seismic station Sawmill, 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 6, AK, USA (WAT6/AK network) | Distance from quake: 61 km / 38 mi | Show on map | Station Info

Seismic station Susitna Watana 6, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Susitna Watana 6, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Susitna Watana 6, 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: 66 km / 41 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

User-reports for this quake

At magnitude 0.9, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

Earlier earthquakes in the same area

Click here to search our database for earlier earthquakes in the same area since 1900!

Try our free app!

Android | iOS version

Why is there advertising on this site?

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:

Improved multilanguage support
Tsunami alerts
Faster responsiveness

Thanks to your past donations, these features have been added recently:

Design upgrade
Detailed quake stats
Additional seismic data sources

Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS

Thank you!

Stop Russia's Agression - Support Ukraine

Significant parts of this website use brilliant open-source software developed by Ukrainians. Russia's unprovoked war has killed tens of thousands, displaced millions, and the beautiful country of Ukraine is being destroyed. We cannot be silent even if the topic of this website has nothing to do with politics.
If you like to support Ukraine from abroad:
Ukrainians recommend the Come Back Alive charity. For other options, see StandWithUkraine.

Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.

Volcanoes & Earthquakes