QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

84km ESE of Maneadero, B.C., MX

Yes. A magnitude 2.8 earthquake was recorded 84km ESE of Maneadero, B.C., MX, at 2:29 am PDT on 19 August 2020 (09:29 UTC), 9.4 km deep. 1 person has reported feeling it to USGS.

· 9.4 km deep · released about 460 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 2.8 (ml)
Depth
9.4 km below the surface
Felt
1 report · strongest reported intensity II
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2203 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 25 km (16 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 460 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.

  1. Mineral, Virginia 2011 M 5.8 33,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 23,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.1× the energy of this one
  4. This earthquake M 2.8 about 460 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 3,100 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 31.5272, -115.7067. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.5 72km WSW of Alberto Oviedo Mota, B.C., MX
  2. 2.4 61 km NW of San Felipe, Mexico
  3. 2.4 56 km ENE of San Vicente, Mexico
  4. 2.1 98km SSW of Alberto Oviedo Mota, B.C., MX
  5. 3.2 52 km ENE of San Vicente, Mexico
  6. 2.5 50 km ENE of San Vicente, Mexico
  7. 2.5 68km E of Maneadero, B.C., MX
  8. 3.0 87km ESE of Maneadero, B.C., MX
  9. 2.8 84km ESE of Maneadero, B.C., MX
  10. 2.9 53 km ENE of San Vicente, Mexico
  11. 3.6 57 km ENE of San Vicente, Mexico
  12. 2.4 88km ESE of Maneadero, B.C., MX
  13. 2.5 53 km ENE of San Vicente, Mexico
  14. 2.0 91km SSW of Alberto Oviedo Mota, B.C., MX
  15. 1.6 62km E of Maneadero, B.C., MX

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.