QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8mb

near the coast of Guerrero, Mexico

· 35 km deep · released about 7.6 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 3.8 (mb)
Depth
35 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1188 days ago

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

How big was it?

This earthquake released about 7.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 710× the energy of this one
  4. This earthquake M 3.8 about 7.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 5.2 on 2023-04-19 — about 130 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 17.2217, -101.1182. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 4.4 37 km SSW of Los Achotes, Mexico
  2. 4.2 36 km WSW of Papanoa, Mexico
  3. 4.4 26 km WSW of Papanoa, Mexico
  4. 4.7 8 km WSW of San Luis de La Loma, Mexico
  5. 4.9 2 km W of Coyuquilla Norte, Mexico
  6. 4.4 14 km S of Papanoa, Mexico
  7. 4.3 8 km NE of Nuxco, Mexico
  8. 4.4 16 km SSW of San Luis San Pedro, Mexico
  9. 4.4 15 km NNE of Petatlán, 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.