4 km S of Round Valley, California

2016-02-27 10:56 UTC · 16 km deep · released about 400 lb of TNT

Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.

When: 2016-02-27 10:56 UTC
Magnitude: M 2.8 (ml)
Depth: 16 km below the surface
Felt: 3 reports · strongest reported intensity III
Nearest: Mono County, 65 km NNW
Status: Reviewed by a seismologist

USGS · last changed by USGS 1517 days ago · we first saw it 1517 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 38,000× the energy of this one
Magna, Utah 2020 M 5.7 27,000× the energy of this one
Around the size people start to feel M 3.0 2.4× the energy of this one
This earthquake M 2.8 about 400 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.

Where

Map loads when it scrolls into view

Epicentre 37.3818, -118.5883. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Mono County, CA	65 km (40 mi)	SSE of here	earthquakes near Mono County
Esmeralda County, NV	95 km (59 mi)	WSW of here	earthquakes near Esmeralda County
Madera County, CA	105 km (65 mi)	E of here	earthquakes near Madera County
Fresno County, CA	117 km (73 mi)	NE of here	earthquakes near Fresno County
Mariposa County, CA	119 km (74 mi)	E of here	earthquakes near Mariposa County
Inyo County, CA	139 km (86 mi)	NW of here	earthquakes near Inyo County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

60 earthquakes have been recorded within 50 km since this one.

2.9 7 km WSW of Aspen Springs, California 10:17 UTC
1.9 7 km ENE of Wilkerson, California 22:21 UTC
2.1 8 km ENE of Wilkerson, California 19:58 UTC
2.2 1 km SE of Mammoth Lakes, California 14:24 UTC
1.8 1 km SE of Mammoth Lakes, California 00:28 UTC
2.9 1 km SSE of Mammoth Lakes, California 00:27 UTC
1.5 5 km SSE of Swall Meadows, California 07:30 UTC
1.9 7 km WSW of Aspen Springs, California 13:21 UTC
1.9 7 km WSW of Aspen Springs, California 12:22 UTC
2.0 7 km WSW of Aspen Springs, California 08:59 UTC
1.6 7 km ENE of Mammoth Lakes, California 16:30 UTC
1.6 14 km SW of Aspen Springs, California 03:30 UTC
2.5 14 km SW of Aspen Springs, California 00:49 UTC
2.1 12 km SW of Aspen Springs, California 07:07 UTC
1.6 14 km SE of Mammoth Lakes, California 22:43 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 21:33 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2016-02-16 — it released about 1,100 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

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.