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

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)
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
Show interactive Map
[smaller] [bigger]

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
(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
(pop: 4,680)
Not felt
Matanuska-Susitna, Alaska
127 km (79 mi)
SE of epicenter
(pop: 9,280)
Not felt
Matanuska-Susitna, Alaska
130 km (81 mi)
SE of epicenter
(pop: 8,360)
Not felt
Matanuska-Susitna, 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
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)
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.


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
Show more

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

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

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
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 297 465 123 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings