132 km NNE of Vieques, Puerto Rico

2018-02-04 16:45 UTC · 42 km deep · released about 950 lb 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: 2018-02-04 16:45 UTC
Magnitude: M 3.0 (md)
Depth: 42 km below the surface
Felt: no reports yet
Nearest: Toa Baja Municipio, 149 km SW
Status: Reviewed by a seismologist

USGS · last changed by USGS 3078 days ago · we first saw it 3078 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 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

Northridge, California 1994 M 6.7 350,000× the energy of this one
Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
Magna, Utah 2020 M 5.7 11,000× the energy of this one
This earthquake M 3.0 about 950 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.

Where

Map loads when it scrolls into view

Epicentre 19.5271, -65.3463. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Toa Baja Municipio, PR	149 km (92 mi)	NE of here	earthquakes near Toa Baja Municipio
Dorado Municipio, PR	152 km (94 mi)	NE of here	earthquakes near Dorado Municipio
Vega Baja Municipio, PR	163 km (101 mi)	NE of here	earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

2.9 135 km NNE of Vieques, Puerto Rico 00:50 UTC
3.4 103 km N of Charlotte Amalie, U.S. Virgin Islands 17:31 UTC
3.4 116 km N of Charlotte Amalie, U.S. Virgin Islands 16:20 UTC
3.3 110 km N of Charlotte Amalie, U.S. Virgin Islands 06:23 UTC
3.3 122 km N of Culebra, Puerto Rico 00:03 UTC
3.4 139 km NNE of Vieques, Puerto Rico 20:23 UTC
3.5 144 km NNW of Charlotte Amalie, U.S. Virgin Islands 02:39 UTC
3.4 151 km N of Charlotte Amalie, U.S. Virgin Islands 11:42 UTC
3.4 111 km N of Charlotte Amalie, U.S. Virgin Islands 13:23 UTC
3.5 105 km N of Charlotte Amalie, U.S. Virgin Islands 22:35 UTC
3.2 105 km N of Charlotte Amalie, U.S. Virgin Islands 23:38 UTC
3.3 111 km NNW of Charlotte Amalie, U.S. Virgin Islands 22:25 UTC
3.3 100 km NNW of Charlotte Amalie, U.S. Virgin Islands 06:35 UTC
3.6 110 km N of Charlotte Amalie, U.S. Virgin Islands 21:52 UTC
3.4 107 km NNW of Charlotte Amalie, U.S. Virgin Islands 17:50 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 23:00 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2017-08-14 — it released about 130 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

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.