Earthquake · reviewed by a seismologist
M 2.0ml
Earthquake near Anchorage, AK
No earthquake was likely felt in Anchorage in the 24 hours to 6:34 am AKST (15:34 UTC). The last one was M 3.5, 39 km (24 mi) SSW, at 4:48 pm AKDT on 27 October 2026, estimated intensity II (weak) in town; 98 felt reports to USGS. Every earthquake near Anchorage
This page: a magnitude 2.0 earthquake was recorded 35 km (22 mi) southwest of Anchorage, AK, at 5:29 am AKDT on 23 April 2018 (13:29 UTC), 15 km deep.
USGS: 18 km ENE of Point Possession, Alaska
35 km (22 mi) SW of Anchorage, AK
- When
- 5:29 am AKDT on 23 April 2018 ()
- Where
- 35 km (22 mi) southwest of Anchorage, AK · earthquakes near Anchorage
- Magnitude
- M 2.0 (ml)
- Depth
- 15 km below the surface
- Felt
- no reports yet
- Nearest
- Anchorage Municipality, 63 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1187 days ago
Earthquake alerts for Anchorage, 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 5 km (3 mi) from the epicentre. In Anchorage, 35 km away, the estimate is intensity II (weak). 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 30 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 500,000× the energy of this one
- Magna, Utah 2020 M 5.7 350,000× the energy of this one
- Around the size people start to feel M 3.0 32× the energy of this one
- This earthquake M 2.0 about 30 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 2017-11-17 — about 4,000 times the energy of this one.
Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:
- 6.8 Southern Alaska · 39 km WNW of this epicentre
- 6.8 4 km NE of Beluga, Alaska · 37 km WNW of this epicentre
- 6.8 24 km ENE of Sterling, Alaska · 40 km S of this epicentre
- 6.4 19 km SSE of Tyonek, Alaska · 38 km WSW of this epicentre
- 5.8 20 km ENE of Beluga, Alaska · 32 km NW 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 61.0145, -150.3995. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Anchorage Municipality, AK | 63 km (39 mi) | ENE | earthquakes near Anchorage Municipality |
| Kenai Peninsula Borough, AK | 127 km (79 mi) | WSW | earthquakes near Kenai Peninsula Borough |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 1.7 16 km WSW of Point MacKenzie, Alaska
- 2.7 28 km WSW of Point MacKenzie, Alaska
- 1.6 26 km WSW of Anchorage, Alaska
- 1.5 20 km E of Sterling, Alaska
- 1.6 Southern Alaska
- 1.8 22 km ESE of Point Possession, Alaska
- 1.6 17 km NE of Beluga, Alaska
- 1.8 25 km ENE of Sterling, Alaska
- 2.5 17 km W of Hope, Alaska
- 1.5 24 km NE of Beluga, Alaska
- 1.6 12 km WSW of Anchorage, Alaska
- 1.5 22 km SSW of Susitna, Alaska
- 1.5 27 km S of Susitna, Alaska
- 2.2 15 km NW of Point Possession, Alaska
- 1.6 27 km ENE of Beluga, 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.