QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

8km E of Mammoth Lakes, CA

· -1.9 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 30 kmMadera County 90 kmMariposa County 90 kmTuolumne County 103 kmMineral County 105 kmEsmeralda County 112 kmFresno County 120 km
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
Magnitude
M 1.7 (md)
Depth
-1.9 km below the surface
Felt
no reports yet
Nearest
Mono County, 30 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1555 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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

Epicentre 37.6478, -118.8925. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 30 km (19 mi) S of here earthquakes near Mono County
Madera County, CA 90 km (56 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 90 km (56 mi) E of here earthquakes near Mariposa County
Tuolumne County, CA 103 km (64 mi) ESE of here earthquakes near Tuolumne County
Mineral County, NV 105 km (65 mi) SSW of here earthquakes near Mineral County
Esmeralda County, NV 112 km (69 mi) W of here earthquakes near Esmeralda County

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

Aftershocks so far

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

  1. 2.1 1km SW of Round Valley, CA
  2. 2.0 34km SE of Bodie, CA
  3. 1.8 0km WSW of Round Valley, CA
  4. 1.8 9km SSE of Mammoth Lakes, CA
  5. 1.7 9km SSE of Mammoth Lakes, CA
  6. 2.3 19km SE of Yosemite Valley, CA
  7. 1.6 12km ESE of Mammoth Lakes, CA
  8. 1.7 20km SE of Yosemite Valley, CA
  9. 1.8 40km N of Toms Place, CA
  10. 1.5 20km ESE of Yosemite Valley, CA
  11. 1.6 20km SE of Yosemite Valley, CA
  12. 2.1 19km SE of Yosemite Valley, CA
  13. 2.3 7km NE of Round Valley, CA
  14. 1.8 14km ESE of Mammoth Lakes, CA
  15. 1.7 18km WSW of Toms Place, CA

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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.2 on 2020-04-11 — it released about 220,000 times the energy of this one.

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

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.