122 km N of Brenas, Puerto Rico

Yes. A magnitude 3.0 earthquake was recorded 122 km N of Brenas, Puerto Rico, at 11:53 am AST on 1 July 2019 (15:53 UTC), 47 km deep.

2019-07-01 15:53 UTC · 47 km deep · released about 1,100 lb 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: 2019-07-01 15:53 UTC
Magnitude: M 3.0 (md)
Depth: 47 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2615 days ago · we first saw it 2615 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. 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 1,100 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 6.7 310,000× the energy of this one
Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
Magna, Utah 2020 M 5.7 9,800× the energy of this one
This earthquake M 3.0 about 1,100 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 4.4 on 2016-10-23 — about 110 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

5.4 106 km N of Brenas, Puerto Rico · 20 km SW of this epicentre Nov 2, 2008
5.0 113 km N of Brenas, Puerto Rico · 11 km SSW of this epicentre Nov 23, 2008

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

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

2.8 81 km N of Brenas, Puerto Rico 02:00 UTC
2.9 85 km N of Tierras Nuevas Poniente, Puerto Rico 15:58 UTC
3.1 112 km N of Brenas, Puerto Rico 21:01 UTC
2.6 81 km N of San Juan, Puerto Rico 10:02 UTC
3.2 126 km N of San Juan, Puerto Rico 00:38 UTC
3.5 124 km N of San Juan, Puerto Rico 14:07 UTC
3.6 136 km N of San Juan, Puerto Rico 01:08 UTC
3.1 119 km N of Hatillo, Puerto Rico 03:08 UTC
2.7 118 km NNE of San Juan, Puerto Rico 22:51 UTC
2.2 80 km N of San Juan, Puerto Rico 12:37 UTC
2.2 82 km N of Brenas, Puerto Rico 08:43 UTC
2.6 86 km N of Brenas, Puerto Rico 06:45 UTC
3.3 126 km N of San Juan, Puerto Rico 03:19 UTC
3.4 135 km N of San Juan, Puerto Rico 09:54 UTC
2.8 91 km N of Brenas, Puerto Rico 15:35 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 15:23 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.