Very strong mag. 6.2 earthquake - North Atlantic Ocean, 13 km north of Horta, Azores, Portugal, on Thursday, July 9, 1998 at 05:19 (GMT)

Very strong mag. 6.2 earthquake - North Atlantic Ocean, 13 km north of Horta, Azores, Portugal, on Thursday, July 9, 1998 at 05:19 (GMT)

Very strong magnitude 6.2 earthquake at 10 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Jul 9, 1998 05:19:07 UTC
Magnitude: 6.2
Depth: 10.0 km
Epicenter latitude / longitude: 38.65°N / 28.626°W (North Atlantic Ocean, Portugal)
Antipode: 38.65°S / 151.374°E
Nearest volcano: Fayal (18 km / 11 mi)
Nearby towns and cities:
13 km (8 mi) N of Horta (pop: 6,570) --> See nearby quakes!
31 km (20 mi) WNW of San Roque (pop: 3,710) --> See nearby quakes!
36 km (23 mi) W of Velas (pop: 1,980) --> See nearby quakes!
43 km (27 mi) NW of Lajes (pop: 4,710) --> See nearby quakes!
53 km (33 mi) W of Calheta (pop: 3,770) --> See nearby quakes!
72 km (45 mi) SW of Santa Cruz da Graciosa (pop: 1,780) --> See nearby quakes!
122 km (76 mi) W of Angra do Heroismo (Angra do Heroísmo Municipality) (pop: 12,000) --> See nearby quakes!
136 km (84 mi) W of Praia da Vitoria (Praia da Vitória) (pop: 6,060) --> See nearby quakes!
278 km (173 mi) WNW of Ponta Delgada (pop: 20,100) --> See nearby quakes!
285 km (177 mi) WNW of Lagoa (pop: 14,400) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.3 x 1014 joules (35 gigawatt hours, equivalent to 30089 tons of TNT or 1.9 atomic bombs!) More info
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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.
6.210 kmAzores Islands, PortugalUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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More info

Recorded aftershocks, latest first (2 quakes)

  • 11 Jul 1998 00:49 UTC
    | M 4.7 |
    10 km (6.2 mi) depth
    23 km (14 mi) distance
    | USGS | Details
  • 09 Jul 1998 06:12 UTC
    | M 4.3 |
    10 km (6.2 mi) depth
    20 km (13 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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