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Minor mag. 3.1 earthquake - Caribbean Sea, 25 km southwest of Saint John, Antigua & Barbuda, on Tuesday, August 3, 2021 at 04:57 GMT

Minor magnitude 3.1 earthquake at 91 km depth

Earthquake details

Date & time	Aug 3, 2021 04:57:40 UTC
Local time at epicenter
Status	Confirmed
Magnitude	3.1
Depth	90.8 km
Epicenter latitude / longitude	17.01892°N / 62.04981°W (Caribbean Sea, Antigua & Barbuda)
Antipode	17.019°S / 117.95°E
Shaking intensity	Not felt
Felt
Primary data source	RENASS (Réseau National de Surveillance Sismique (RéNaSS))
Nearest volcano	Soufriere Hills (36 km / 22 mi)
Nearby towns and cities	19 km (12 mi) WSW of Bolands (pop: 1,660) \| Show on map \| Quakes nearby 25 km (15 mi) WSW of Saint John (pop: 24,200) \| Show on map \| Quakes nearby 28 km (17 mi) W of All Saints (pop: 2,530) \| Show on map \| Quakes nearby 29 km (18 mi) W of Falmouth (pop: 619) \| Show on map \| Quakes nearby 29 km (18 mi) WSW of Piggotts (pop: 1,880) \| Show on map \| Quakes nearby 78 km (49 mi) ESE of Basseterre (St. Kitts & Nevis) (pop: 12,900) \| Show on map \| Quakes nearby 119 km (74 mi) NNW of Basse Terre (Guadeloupe) (pop: 11,500) \| Show on map \| Quakes nearby 129 km (80 mi) SE of Gustavia (St. Barthélemy) (pop: 5,990) \| Show on map \| Quakes nearby 154 km (96 mi) SE of Philipsburg (Sint Maarten) (pop: 1,400) \| Show on map \| Quakes nearby 160 km (99 mi) SE of Marigot (St. Martin) (pop: 5,700) \| Show on map \| Quakes nearby 28 km (17 mi) WSW of Antigua Island (pop: 69,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake
Estimated seismic energy released	2.8 x 10⁹ joules (783 kilowatt hours, equivalent to 0.674 tons of TNT) \| about seismic energy

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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag.	Depth	Location	Source
3.1	91 km	Antigua & Barbuda: Near Les Abymes	RENASS

Most recent quakes Top 20 past 24 hrs

Seismograms

Seismic station: Olveston, Montserrat (OLV1/MC network) | Distance from quake: 35 km / 22 mi | Show on map | Station Info

Seismic station Olveston, Montserrat: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Olveston, Montserrat: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Olveston, Montserrat: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: North Barbuda Island (ANWB/CU network) | Distance from quake: 77 km / 48 mi | Show on map | Station Info

Seismic station North Barbuda Island: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station North Barbuda Island: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station North Barbuda Island: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Netherlands Antilles Seismic Network (SABA/NA network) | Distance from quake: 143 km / 89 mi | Show on map | Station Info

Seismic station Netherlands Antilles Seismic Network: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Netherlands Antilles Seismic Network: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Netherlands Antilles Seismic Network: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Morne la Rosette, Martinique, France (FDFM/G network) | Distance from quake: 271 km / 169 mi | Show on map | Station Info

Seismic station Morne la Rosette, Martinique, France: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Morne la Rosette, Martinique, France: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Morne la Rosette, Martinique, France: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: San Juan, Puerto Rico (SJG/IU network) | Distance from quake: 451 km / 280 mi | Show on map | Station Info

Seismic station San Juan, Puerto Rico: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station San Juan, Puerto Rico: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station San Juan, Puerto Rico: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

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