M 3.9 earthquake – 221 km SE of Chiniak, Alaska
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Local time: Jan 23, 2018 · 00:44 (UTC-9)
MinorShallow · 21 km
Reviewed by a seismologist
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- Magnitude
- 3.9local (Richter) magnitude (ml)
- Depth
- 21 kmShallow earthquake
- Epicenter
- 56.242, -149.639554 km from Anchorage
- Energy released
- 11 tons of TNTless than one Hiroshima bomb
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- —not estimated
- Aftershocks
- 500M2.5+ within 30 km, up to 60 days
- Significance
- 234USGS score, 0–1,000+
Not rare around here
An earthquake at least as strong struck within 300 km on Jan 23, 2018.
How strong was it?
Minor earthquake. It released 11 tons of TNT, 45 times less than a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
500 earthquakes of M2.5+ within 30 km in the 60 days after.
- 5.0 246 km SE of Chiniak, Alaska Jan 23, 2018
- 4.4 239 km SE of Chiniak, Alaska Jan 23, 2018
- 4.8 245 km SE of Chiniak, Alaska Jan 23, 2018
- 4.7 225 km SE of Chiniak, Alaska Jan 23, 2018
- 4.3 249 km SE of Chiniak, Alaska Jan 23, 2018
- 4.1 205 km SE of Chiniak, Alaska Jan 23, 2018
- 3.6 210 km SE of Chiniak, Alaska Jan 23, 2018
- 4.5 228 km SE of Chiniak, Alaska Jan 23, 2018
- 3.6 212 km SE of Chiniak, Alaska Jan 23, 2018
- 4.2 248 km SE of Chiniak, Alaska Jan 23, 2018
The strongest earthquakes within 300 km
Since 1900, around United States.
- 7.9 261 km SE of Chiniak, Alaska Jan 23, 2018
- 7.9 Kodiak Island region, Alaska Oct 9, 1900
- 7.0 153 km SE of Halibut Cove, Alaska Dec 23, 1906
- 6.9 47 km S of Old Harbor, Alaska Jan 10, 2001
- 6.8 100 km SSE of Old Harbor, Alaska Jun 19, 1986
- 6.8 17 km N of Ouzinkie, Alaska Sep 4, 1965
- 6.7 120 km S of Akhiok, Alaska Apr 10, 1957
- 6.6 124 km SSE of Halibut Cove, Alaska Apr 23, 1968