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Minor mag. 1.6 earthquake - Portugal: S. Jorge on Saturday, Mar 18, 2023 at 1:47 pm (GMT -1) -

Minor magnitude 1.6 earthquake at 0 km depth

18 Mar 14:59 UTC: First to report: IVAR (AZO) after 11 minutes.
18 Mar 15:06: Magnitude recalculated from 1.5 to 1.6. Epicenter location corrected by 0.7 km (0.4 mi) towards SSW.

Earthquake details

Date & time	Mar 18, 2023 14:47:38 UTC -
Local time at epicenter	Saturday, Mar 18, 2023 at 1:47 pm (GMT -1)
Status	Confirmed
Magnitude	1.6
Depth	0.0 km
Epicenter latitude / longitude	38.704°N / 28.168°W (Portugal)
Antipode	38.704°S / 151.832°E
Shaking intensity	Very weak shaking
Felt	0 reports
Primary data source	IVAR (AZO) (Instituto de Investigação em Vulcanologia e Avaliação de Riscos)
Nearest volcano	São Jorge (7 km / 4 mi)
Nearby towns and cities	2 km (1 mi) WNW of Toledo (pop: 60) \| Show on map \| Quakes nearby 4 km (3 mi) NE of Velas (pop: 1,980) \| Show on map \| Quakes nearby 17 km (11 mi) NW of Calheta (pop: 3,770) \| Show on map \| Quakes nearby 24 km (15 mi) NNE of San Roque (pop: 3,710) \| Show on map \| Quakes nearby 35 km (22 mi) NNE of Lajes (pop: 4,710) \| Show on map \| Quakes nearby 44 km (27 mi) ENE of Horta (pop: 6,570) \| Show on map \| Quakes nearby 45 km (28 mi) SSW of Santa Cruz da Graciosa (pop: 1,780) \| Show on map \| Quakes nearby 83 km (51 mi) W of Angra do Heroismo (Angra do Heroísmo Municipality) (pop: 12,000) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Overcast Clouds 15.7°C (60 F), humidity: 80%, wind: 7 m/s (13 kts) from S
Estimated seismic energy released	1.6 x 10⁷ joules (4.4 kilowatt hours) \| 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
1.6	0 km	Portugal: S. Jorge	IVAR (AZO)

Most recent quakes Top 20 past 24 hrs Quakes in Portugal

Seismograms

Seismic station: (ROSA/PM network) | Distance from quake: 7 km / 4 mi | Show on map | Station Info

Seismic station : 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

User reports for this quake

At magnitude 1.6, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.

Earlier earthquakes in the same area

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