QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

91km ESE of Maneadero, B.C., MX

Yes. A magnitude 2.1 earthquake was recorded 91km ESE of Maneadero, B.C., MX, at 5:01 pm PDT on 20 August 2020 (00:01 UTC), 9.2 km deep.

· 9.2 km deep · released about 41 lb of TNT

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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 2.1 (ml)
Depth
9.2 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2271 days ago

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 14 km (9 mi) from the epicentre. 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 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 in our catalogue was M 5.1 on 2020-08-17 — about 35,000 times the energy of this one.

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 31.4983, -115.6452. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.5 88km SSW of Alberto Oviedo Mota, B.C., MX
  2. 2.6 58 km ENE of San Vicente, Mexico
  3. 3.7 84km ESE of Maneadero, B.C., MX
  4. 3.0 84km ESE of Maneadero, B.C., MX
  5. 2.9 60 km E of San Vicente, Mexico
  6. 2.4 78km ESE of Maneadero, B.C., MX
  7. 2.5 81km ESE of Maneadero, B.C., MX
  8. 2.5 89km ESE of Maneadero, B.C., MX
  9. 2.7 88km ESE of Maneadero, B.C., MX
  10. 2.5 72km WSW of Alberto Oviedo Mota, B.C., MX
  11. 2.4 61 km NW of San Felipe, Mexico
  12. 2.4 56 km ENE of San Vicente, Mexico
  13. 2.1 98km SSW of Alberto Oviedo Mota, B.C., MX
  14. 3.2 52 km ENE of San Vicente, Mexico
  15. 2.5 50 km ENE of San Vicente, Mexico

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.