Earthquake · reviewed by a seismologist
M 2.7ml
Earthquake near Winslow, AZ
USGS: 17 km S of Winslow West, Arizona
- When
- 7:27 pm MST on 31 December 2020 ()
- Where
- 18 km (11 mi) SSW of Winslow, AZ · earthquakes near Winslow
- Magnitude
- M 2.7 (ml)
- Depth
- 5.0 km below the surface
- Felt
- no reports yet
- Nearest
- Navajo County, 71 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2029 days ago
A magnitude 2.7 earthquake was recorded 18 km (11 mi) SSW of Winslow, AZ, at 7:27 pm MST on 31 December 2020 (02:27 UTC). This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
Earthquakes near other towns within 30 km: LeChee.
How big was it?
This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
- Magna, Utah 2020 M 5.7 32,000× the energy of this one
- Around the size people start to feel M 3.0 2.8× the energy of this one
- This earthquake M 2.7 about 340 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.1 40 km SSW of Winslow West, Arizona · 25 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 34.8795, -110.7797. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Navajo County, AZ | 71 km (44 mi) | NE | earthquakes near Navajo County |
| Apache County, AZ | 130 km (81 mi) | ENE | earthquakes near Apache County |
| Coconino County, AZ | 139 km (86 mi) | NW | earthquakes near Coconino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 2.7 5 km W of LeChee, Arizona
- 3.0 32 km WSW of LeChee, Arizona
- 2.5 35 km WSW of LeChee, Arizona
- 2.8 28 km NE of Washington Park, Arizona
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.