Sismo debile mag. 3.1 - North Pacific Ocean, 39 km a sud ovest da Fortuna, Contea di Humboldt County, Contea di Kern, Stati Uniti, lunedí, 17 maggio 2021 -
Sismo debile magnitudine 3.1 at 15 km depth
17 May 07:12 UTC: Primo a segnalare: USGS dopo 3 minuti.
Update Mon, 17 May 2021, 07:18Small magnitude 3.1 quake hits 25 miles southwest of Fortuna, California, United States after midnight
3.1 quake 17 May 12:09 am (GMT -7)
An earthquake of magnitude 3.1 occurred after midnight on Monday 17 May 2021 at 12:09 am local time near Fortuna, Humboldt County, California, USA, as reported by the United States Geological Survey.
According to preliminary data, the quake was located at a shallow depth of 9.5 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.1 as well.
According to preliminary calculations, we do not expect that the quake was felt by many people and did not cause any damage. In Ferndale (pop. 1,400, 20 miles away), Rio Dell (pop. 3,400, 21 miles away), Hydesville (pop. 1,200, 24 miles away), Fortuna (pop. 12,000, 25 miles away), Eureka (pop. 27,000, 37 miles away), Bayside (pop. 17,100, 42 miles away), Arcata (pop. 17,800, 43 miles away), and McKinleyville (pop. 15,200, 47 miles away), the quake was probably not felt.
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Data & ora: 17 May 2021 07:09:31 UTC -
Ora locale a epicentro:
Monday, 17 May 2021 00:09 (GMT -7)
Profondità: 15.3 km
Epicentro latitudine / longitudine: 40.30817°N / 124.4255°W
(North Pacific Ocean
, Contea di Kern
, Stati Uniti
Vulcano più vicino: Clear Lake
(206 km / 128 mi)
Nearby towns and cities:33 km SSO da Ferndale
(pop: 1,370) --> Vedi sismi vicini34 km SO da Rio Dell
(pop: 3,390) --> Vedi sismi vicini39 km SO da Fortuna (Humboldt County)
(pop: 12,000) --> Vedi sismi vicini55 km ONO da Redway
(pop: 1,230) --> Vedi sismi vicini59 km SSO da Eureka (Humboldt County)
(pop: 27,000) --> Vedi sismi vicini67 km SSO da Bayside (Humboldt County)
(pop: 17,100) --> Vedi sismi vicini69 km SSO da Arcata (Humboldt County)
(pop: 17,800) --> Vedi sismi vicini76 km SSO da McKinleyville (Humboldt County)
(pop: 15,200) --> Vedi sismi vicini175 km O da Redding
(pop: 91,600) --> Vedi sismi vicini240 km NO da Windsor (Sonoma County)
(pop: 27,500) --> Vedi sismi vicini
Fonte dati primaria: USGS
(United States Geological Survey)
Stima dell'energia sismica liberata: 2.8 x 109
joules (783 kilowatt hours, equivalent to 0.674 tons of TNT) More info
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.
|3.1||15 km||12km W of Petrolia, CA||USGS|
|3.1||15 km||OFFSHORE NORTHERN CALIFORNIA||EMSC|
User reports for this quake (2)
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90061 / Light shaking (MMI IV)
Baldwin Park / Very weak shaking (MMI II) / simple rolling (tilting sideways along one direction) / 2-5 s : Like a rocking chair I was sleeping and it woke me up
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