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Mag. 1.8 quake - Copper River, 112 mi east of Anchorage, Anchorage, Alaska, USA, on Tuesday, Nov 28, 2023, at 06:08 pm (Anchorage time) -

A light magnitude 1.8 earthquake hit 181 km (112 mi) away from Anchorage, Alaska,  United States, in the late afternoon of Tuesday, Nov 28, 2023 at 6.08 pm local time (America/Anchorage GMT -9). The quake had a moderate depth of 73 km (45 mi) and was too small to be felt by people.

Mag. 1.8 quake - Copper River, 112 mi east of Anchorage, Anchorage, Alaska, USA, on Tuesday, Nov 28, 2023, at 06:08 pm (Anchorage time) Mag. 1.8 quake - Copper River, 112 mi east of Anchorage, Anchorage, Alaska, USA, on Tuesday, Nov 28, 2023, at 06:08 pm (Anchorage time)

Minor magnitude 1.8 earthquake at 73 km depth

29 Nov 03:10 UTC: First to report: USGS after 2 minutes.

Earthquake details

Date & timeNov 29, 2023 03:08:00 UTC -
Local time at epicenterTuesday, Nov 28, 2023, at 06:08 pm (America/Anchorage GMT -9)
StatusConfirmed
Magnitude1.8
Depth72.5 km
Epicenter latitude / longitude61.7683°N / 146.6999°W Copper River, Alaska, United States
Seismic antipode61.7683°S / 33.3001°E
Shaking intensityNot felt
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoWrangell (143 km / 89 mi)
Weather at epicenter at time of quakeBroken Clouds -13.6°C (7 F), humidity: 89%, wind: 3 m/s (6 kts) from SSE
Estimated seismic energy released3.2 x 107 joules (8.78 kilowatt hours) | about seismic energy
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User-reports for this quake

There are no user reports for this quake yet.
At magnitude 1.8, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.
If you felt it, be the first to report it!
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Earthquake statistics

Average number of earthquakes

Based on data from the past 10 years and our earthquake archive back to 1900, there are about 12,000 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):
  • Mag. 7 or higher: 0.01 quakes per year (or 1 quake every 100 years)
  • Mag. 6 or higher: 0.08 quakes per year (or 1 quake every 12.5 years)
  • Mag. 5 or higher: 0.3 quakes per year (or 1 quake every 3.3 years)
  • Mag. 4 or higher: 2 quakes per year
  • Mag. 3 or higher: 16 quakes per year
  • Mag. 2 or higher: 213 quakes per year (or 17.8 quakes per month)
  • Mag. 1 or higher: 1,100 quakes per year (or 3 quakes per day)
The area where this quake occurred has a high level of seismic activity. It has had at least 10 quakes above magnitude 6 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 10 to 15 years.

Number of quakes per year