224 km SW of La Cruz de Loreto, Mexico

2019-05-31 11:57 UTC · 10 km deep · released about 7.6 kilotons of TNT

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: 2019-05-31 11:57 UTC
Magnitude: M 5.8 (mww)
Depth: 10 km below the surface
Felt: 1 report · strongest reported intensity II
USGS impact alert: green
Status: Reviewed by a seismologist

USGS · last changed by USGS 284 days ago · we first saw it 284 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 7.6 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.8 would have released about 32 times as much.

Ridgecrest, California 2019 M 7.1 89× the energy of this one
Loma Prieta, California 1989 M 6.9 45× the energy of this one
Northridge, California 1994 M 6.7 22× the energy of this one
This earthquake M 5.8 about 7.6 kilotons of TNT
Magna, Utah 2020 M 5.7 this one released 1.4× more
Around the size people start to feel M 3.0 this one released 16,000× 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 6.6 on 2016-01-21 — about 16 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

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Aftershocks so far

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

5.5 201 km SW of José María Morelos, Mexico 19:33 UTC
5.9 240 km SW of La Cruz de Loreto, Mexico 20:43 UTC
4.2 243 km WSW of La Cruz de Loreto, Mexico 08:56 UTC
5.9 225 km SW of José María Morelos, Mexico 19:40 UTC
4.0 221 km SW of La Cruz de Loreto, Mexico 04:36 UTC
4.4 184 km WSW of José María Morelos, Mexico 03:35 UTC
4.4 262 km WSW of La Cruz de Loreto, Mexico 12:30 UTC
6.0 213 km SW of La Cruz de Loreto, Mexico 23:22 UTC
4.0 206 km SW of La Cruz de Loreto, Mexico 18:24 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:08 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

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