67 km NNE of Cruz Bay, U.S. Virgin Islands

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 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 38 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 390,000× the energy of this one
2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
3. Around the size people start to feel M 3.0 25× the energy of this one
4. This earthquake M 2.1 about 38 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 since 2016 was M 4.3 on 2016-08-27 — about 2,200 times the energy of this one.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

1. 6.1 91 km N of Charlotte Amalie, U.S. Virgin Islands · 33 km NW of this epicentre Oct 11, 2008
2. 5.9 68 km N of Cruz Bay, U.S. Virgin Islands · 7 km WNW of this epicentre Jun 25, 1930
3. 5.9 65 km NNE of Cruz Bay, U.S. Virgin Islands · 8 km ESE of this epicentre Jun 26, 1985
4. 5.7 80 km NNE of Cruz Bay, U.S. Virgin Islands · 14 km NNE of this epicentre Aug 2, 1927
5. 5.3 78 km NNE of Cruz Bay, U.S. Virgin Islands · 11 km N of this epicentre Aug 14, 2006

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 18.9228, -64.6448. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

1. 1.9 78 km NNE of Cruz Bay, U.S. Virgin Islands 07:07 UTC
2. 2.6 100 km NNE of Cruz Bay, U.S. Virgin Islands 07:06 UTC
3. 2.6 83 km NNE of Cruz Bay, U.S. Virgin Islands 06:52 UTC
4. 2.0 111 km N of Cruz Bay, U.S. Virgin Islands 06:51 UTC
5. 2.4 93 km N of Cruz Bay, U.S. Virgin Islands 06:37 UTC
6. 2.4 91 km NNE of Cruz Bay, U.S. Virgin Islands 06:27 UTC
7. 2.1 98 km NNE of Cruz Bay, U.S. Virgin Islands 06:03 UTC
8. 2.3 92 km NNE of Cruz Bay, U.S. Virgin Islands 05:22 UTC
9. 2.5 98 km NNE of Cruz Bay, U.S. Virgin Islands 05:14 UTC
10. 2.2 90 km NNE of Cruz Bay, U.S. Virgin Islands 04:23 UTC
11. 2.5 97 km NNE of Cruz Bay, U.S. Virgin Islands 04:15 UTC
12. 2.7 101 km NNE of Cruz Bay, U.S. Virgin Islands 03:59 UTC
13. 2.1 93 km NNE of Cruz Bay, U.S. Virgin Islands 03:58 UTC
14. 2.1 74 km NNE of Cruz Bay, U.S. Virgin Islands 06:21 UTC
15. 1.9 64 km N of Charlotte Amalie, U.S. Virgin Islands 06:14 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 18:06 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.