Earthquake · reviewed by a seismologist
M 2.9md
112 km N of San Juan, Puerto Rico
Yes. A magnitude 2.9 earthquake was recorded 112 km N of San Juan, Puerto Rico, at 10:02 pm AST on 1 March 2019 (02:02 UTC), 19 km deep.
- When
- Magnitude
- M 2.9 (md)
- Depth
- 19 km below the surface
- Felt
- no reports yet
- Nearest
- Loíza Municipio, 113 km S
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2738 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, people at rest would likely notice it out to about 27 km (17 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 750 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 20,000× the energy of this one
- Magna, Utah 2020 M 5.7 14,000× the energy of this one
- Around the size people start to feel M 3.0 1.3× the energy of this one
- This earthquake M 2.9 about 750 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 160 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 5.4 106 km N of Brenas, Puerto Rico · 47 km W of this epicentre
- 5.1 92 km N of Suárez, Puerto Rico · 32 km SE of this epicentre
- 5.0 113 km N of Brenas, Puerto Rico · 41 km W 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 19.4653, -65.9366. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Loíza Municipio, PR | 113 km (70 mi) | S | earthquakes near Loíza Municipio |
| Toa Baja Municipio, PR | 115 km (72 mi) | SSW | earthquakes near Toa Baja Municipio |
| Dorado Municipio, PR | 115 km (72 mi) | SSW | earthquakes near Dorado Municipio |
| Cataño Municipio, PR | 116 km (72 mi) | S | earthquakes near Cataño Municipio |
| San Juan Municipio, PR | 117 km (73 mi) | S | earthquakes near San Juan Municipio |
| Carolina Municipio, PR | 119 km (74 mi) | S | earthquakes near Carolina Municipio |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
41 earthquakes have been recorded within 50 km since this one.
- 2.7 103 km N of San Juan, Puerto Rico
- 2.8 121 km N of Brenas, Puerto Rico
- 4.0 121 km N of San Juan, Puerto Rico
- 3.3 111 km NNE of Suárez, Puerto Rico
- 3.2 112 km NNE of Suárez, Puerto Rico
- 2.7 115 km NNE of Vieques, Puerto Rico
- 2.2 91 km N of Brenas, Puerto Rico
- 3.1 119 km N of San Juan, Puerto Rico
- 3.1 116 km NNE of Suárez, Puerto Rico
- 3.4 116 km NNE of Suárez, Puerto Rico
- 2.8 109 km N of Suárez, Puerto Rico
- 3.1 111 km N of Brenas, Puerto Rico
- 2.5 93 km N of Brenas, Puerto Rico
- 2.2 101 km N of Suárez, Puerto Rico
- 2.5 112 km NNE of Suárez, 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.