QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Alamo, NV

USGS: 18 km ESE of Alamo, Nevada

10:40 pm PDT, Sep 7, 2017 · · 2.6 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Lincoln County 40 kmClark County 119 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
10:40 pm PDT on 7 September 2017 ()
Where
18 km (11 mi) ESE of Alamo, NV · earthquakes near Alamo
Magnitude
M 2.1 (ml)
Depth
2.6 km below the surface
Felt
no reports yet
Nearest
Lincoln County, 40 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3015 days ago

A magnitude 2.1 earthquake was recorded 18 km (11 mi) ESE of Alamo, NV, at 10:40 pm PDT on 7 September 2017 (05:40 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

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.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.3 37 km SSW of Caliente, Nevada · 29 km E of this epicentre
  2. 5.0 43 km SSE of Alamo, Nevada · 32 km S 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 37.2854, -114.9828. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Lincoln County, NV 40 km (25 mi) NNE earthquakes near Lincoln County
Clark County, NV 119 km (74 mi) S earthquakes near Clark 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. 2.5 26 km SW of Alamo, Nevada
  2. 1.6 24 km SSE of Alamo, Nevada
  3. 1.5 18 km E of Alamo, Nevada
  4. 1.6 12 km ENE of Hiko, Nevada
  5. 1.9 44 km ESE of Alamo, Nevada
  6. 1.7 12 km ENE of Hiko, Nevada
  7. 2.0 12 km E of Hiko, Nevada
  8. 1.5 18 km ENE of Alamo, Nevada
  9. 1.8 36 km SE of Alamo, Nevada
  10. 1.5 18 km SSE of Alamo, Nevada
  11. 1.9 34 km SE of Alamo, Nevada
  12. 2.9 11 km ESE of Alamo, Nevada
  13. 1.6 15 km SSW of Caliente, Nevada
  14. 1.6 31 km W of Alamo, Nevada
  15. 1.6 31 km W of Alamo, Nevada

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

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