25 km SE of Aquila, Mexico

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 13 people have reported feeling it to USGS.

How big was it?

This earthquake released about 670 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 6.7 250× the energy of this one
2. Mineral, Virginia 2011 M 5.8 11× the energy of this one
3. Magna, Utah 2020 M 5.7 7.9× the energy of this one
4. This earthquake M 5.1 about 670 tons of TNT
5. Around the size people start to feel M 3.0 this one released 1,400× 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 4.7 on 2016-04-26.

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 18.4075, -103.3690. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 4.3 11 km ENE of Aquila, Mexico 18:45 UTC
2. 4.3 7 km E of Aquila, Mexico 04:32 UTC
3. 4.4 19 km SE of Aquila, Mexico 10:53 UTC
4. 4.9 12 km SSE of Aquila, Mexico 10:46 UTC
5. 4.8 21 km ESE of Aquila, Mexico 09:18 UTC
6. 6.2 18 km SE of Aquila, Mexico 08:32 UTC
7. 4.0 56 km SE of La Placita de Morelos, Mexico 02:28 UTC
8. 4.0 60 km SSE of La Placita de Morelos, Mexico 09:22 UTC
9. 4.5 42 km S of La Placita de Morelos, Mexico 01:00 UTC
10. 4.4 Colima-Michoacan border region, Mexico 00:58 UTC
11. 4.7 41 km SE of La Placita de Morelos, Mexico 15:35 UTC
12. 4.7 31 km SSE of Coalcomán de Vázquez Pallares, Mexico 07:44 UTC
13. 4.1 32 km SSE of La Placita de Morelos, Mexico 15:47 UTC
14. 4.4 36 km S of La Placita de Morelos, Mexico 07:03 UTC
15. 4.4 47 km SSE of La Placita de Morelos, Mexico 07:07 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 12:14 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.