QuakeIndex

Earthquake · reviewed by a seismologist

M 5.1mw

88km ESE of Maneadero, B.C., MX

Yes. A magnitude 5.1 earthquake was recorded 88km ESE of Maneadero, B.C., MX, at 8:30 am PDT on 17 August 2020 (15:30 UTC), 16 km deep. 744 people have reported feeling it to USGS.

· 16 km deep · released about 720 tons 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 5.1 (mw)
Depth
16 km below the surface
Felt
744 reports · strongest reported intensity IV
Measured shaking
intensity VII (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 325 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre.

At this magnitude and depth, people at rest would likely notice it out to about 208 km (129 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 720 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10× the energy of this one
  3. Magna, Utah 2020 M 5.7 7.4× the energy of this one
  4. This earthquake M 5.1 about 720 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 1,500× more

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 4.5 on 2019-04-20.

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 31.5367, -115.6613. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.3 53 km ENE of San Vicente, Mexico
  2. 2.8 58 km ENE of San Vicente, Mexico
  3. 2.2 58 km ENE of San Vicente, Mexico
  4. 2.4 56 km ENE of San Vicente, Mexico
  5. 2.5 50 km ENE of San Vicente, Mexico
  6. 2.4 89km ESE of Maneadero, B.C., MX
  7. 3.3 56 km ENE of San Vicente, Mexico
  8. 3.3 53 km ENE of San Vicente, Mexico
  9. 2.6 57 km ENE of San Vicente, Mexico
  10. 2.3 55 km ENE of San Vicente, Mexico
  11. 3.2 55 km ENE of San Vicente, Mexico
  12. 2.7 55 km ENE of San Vicente, Mexico
  13. 2.1 89km SSW of Alberto Oviedo Mota, B.C., MX
  14. 2.2 57km E of Maneadero, B.C., MX
  15. 2.4 54 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.