Earthquake · reviewed by a seismologist
M 2.1ml
16 km SSW of Tatitlek, Alaska
Yes. A magnitude 2.1 earthquake was recorded 16 km SSW of Tatitlek, Alaska, at 11:49 am AKST on 9 March 2024 (20:49 UTC), 16 km deep.
- When
- Magnitude
- M 2.1 (ml)
- Depth
- 16 km below the surface
- Felt
- no reports yet
- Nearest
- Chugach Census Area, 40 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 960 days ago
Earthquake alerts for Valdez, AK
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 7 km (4 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
How big was it?
This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
- Magna, Utah 2020 M 5.7 250,000× the energy of this one
- Around the size people start to feel M 3.0 22× the energy of this one
- This earthquake M 2.1 about 43 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.4 on 2022-07-09 — about 2,800 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 9.2 The 1964 Prince William Sound, Alaska Earthquake · 38 km WNW of this epicentre
- 7.0 52 km NE of Chenega, Alaska · 49 km SW of this epicentre
- 6.7 Prince William Sound, Alaska · 17 km WSW of this epicentre
- 6.6 37 km WNW of Tatitlek, Alaska · 45 km NW of this epicentre
- 6.4 Prince William Sound, Alaska · 41 km SW of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 60.7227, -146.7550. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Chugach Census Area, AK | 40 km (25 mi) | SE | earthquakes near Chugach Census Area |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 1.5 28 km SSW of Tatitlek, Alaska
- 4.3 29 km SSW of Tatitlek, Alaska
- 1.8 10 km S of Valdez, Alaska
- 1.5 16 km N of Tatitlek, Alaska
- 1.8 52 km NE of Chenega, Alaska
- 1.6 29 km WSW of Tatitlek, Alaska
- 1.6 30 km W of Valdez, Alaska
- 3.1 13 km ESE of Tatitlek, Alaska
- 1.7 1 km NNE of Tatitlek, Alaska
- 1.7 10 km W of Tatitlek, Alaska
- 3.0 9 km W of Tatitlek, Alaska
- 1.7 34 km WSW of Tatitlek, Alaska
- 2.1 57 km SSW of Tatitlek, Alaska
- 1.8 18 km NW of Tatitlek, Alaska
- 1.5 20 km NW of Tatitlek, Alaska
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.