Earthquake · reviewed by a seismologist
M 2.3md
108 km N of Suárez, Puerto Rico
Yes. A magnitude 2.3 earthquake was recorded 108 km N of Suárez, Puerto Rico, at 11:16 pm AST on 30 July 2018 (03:16 UTC), 30 km deep.
- When
- Magnitude
- M 2.3 (md)
- Depth
- 30 km below the surface
- Felt
- no reports yet
- Nearest
- Loíza Municipio, 110 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2948 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause 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 94 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 160,000× the energy of this one
- Magna, Utah 2020 M 5.7 110,000× the energy of this one
- Around the size people start to feel M 3.0 10× the energy of this one
- This earthquake M 2.3 about 94 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 4.5 on 2018-03-06 — about 1,800 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 5.1 122 km NNE of Vieques, Puerto Rico · 38 km E of this epicentre
- 5.1 92 km N of Suárez, Puerto Rico · 16 km SSW of this epicentre
- 5.0 73 km NNE of Vieques, Puerto Rico · 48 km SSE of this epicentre
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 19.3975, -65.6756. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Loíza Municipio, PR | 110 km (68 mi) | SSW | earthquakes near Loíza Municipio |
| Fajardo Municipio, PR | 113 km (70 mi) | S | earthquakes near Fajardo Municipio |
| Río Grande Municipio, PR | 114 km (71 mi) | S | earthquakes near Río Grande Municipio |
| Luquillo Municipio, PR | 115 km (71 mi) | S | earthquakes near Luquillo Municipio |
| Carolina Municipio, PR | 115 km (72 mi) | SSW | earthquakes near Carolina Municipio |
| San Juan Municipio, PR | 116 km (72 mi) | SSW | earthquakes near San Juan Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
33 earthquakes have been recorded within 50 km since this one.
- 3.1 92 km N of San Juan, Puerto Rico
- 2.9 116 km NNE of Vieques, Puerto Rico
- 2.8 82 km N of Suárez, Puerto Rico
- 3.3 117 km NNE of Suárez, Puerto Rico
- 3.1 116 km NNE of Vieques, Puerto Rico
- 3.4 128 km NNE of Vieques, Puerto Rico
- 3.2 125 km N of Culebra, Puerto Rico
- 3.4 135 km NNE of Suárez, Puerto Rico
- 2.9 127 km NNE of Vieques, Puerto Rico
- 3.2 103 km N of San Juan, Puerto Rico
- 3.1 Puerto Rico region
- 2.3 77 km NNE of San Juan, Puerto Rico
- 2.6 72 km N of Suárez, Puerto Rico
- 3.1 93 km NNE of San Juan, Puerto Rico
- 2.8 89 km N of San Juan, Puerto Rico
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . 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.