Moderate mag. 5.1 earthquake - Northern Mid-Atlantic Ridge on Monday, 21 April 1975
Depth: 33.0 km
Epicenter latitude / longitude: 45.317°N / 28.003°W (international territory)
Primary data source: USGS
Estimated released energy: 2.8 x 1012 joules (783 megawatt hours, equivalent to 674 tons of TNT) [learn more]
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.
|Time||Mag. / Depth||Location||Source|
|Mon, 21 Apr 06:14 UTC||M 5.1 / 33 km||Northern Mid-Atlantic Ridge||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Aftershocks of the 5.1 quake: Northern Mid-Atlantic Ridge, 21 Apr 1975 06:14
More infoRecorded aftershocks, latest first (1 quakes):
- 21 Apr 1975 19:14 UTC| M 4.8 |33 km (20.5 mi) depth|6 km (4 mi) distance| USGS | Details