Sismo debile mag. 3.0 - North Pacific Ocean, 8.1 km a nord ovest da Eureka, Contea di Humboldt County, Contea di Kern, Stati Uniti, martedí, 04 maggio 2021 -
Sismo debile magnitudine 3.0 at 24 km depth
4 May 07:39 UTC: Primo a segnalare: USGS dopo 2 minuti.
Update Tue, 4 May 2021, 07:45Small magnitude 3.0 earthquake 5 miles northwest of Eureka, California, United States
3.0 quake 4 May 12:37 am (GMT -7)
Just 7 minutes ago, a 3.0-magnitude earthquake struck near Eureka, Humboldt County, California, USA. The tremor was recorded after midnight on Tuesday 4 May 2021 at 12:37 am local time, at a shallow depth of 15 miles below the surface.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.0 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Samoa (pop. 260) located 3 miles from the epicenter, Eureka (pop. 27,000) 5 miles away, Humboldt Hill (pop. 3,400) 8 miles away, Pine Hills (pop. 3,100) 9 miles away, and Arcata (pop. 17,800) 9 miles away. In Bayside (pop. 17,100, 10 miles away), McKinleyville (pop. 15,200, 11 miles away), and Fortuna (pop. 12,000, 17 miles away), the quake was probably not felt.
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Data & ora: 4 May 2021 07:37:40 UTC -
Ora locale a epicentro:
Tuesday, 4 May 2021 00:37 (GMT -7)
Profondità: 23.6 km
Epicentro latitudine / longitudine: 40.83733°N / 124.24834°W
(North Pacific Ocean
, Contea di Kern
, Stati Uniti
Vulcano più vicino: Mount Shasta
(183 km / 114 mi)
Nearby towns and cities:6 km ONO da Samoa
(pop: 258) --> Vedi sismi vicini8 km ONO da Eureka (Humboldt County)
(pop: 27,000) --> Vedi sismi vicini14 km OSO da Arcata (Humboldt County)
(pop: 17,800) --> Vedi sismi vicini16 km O da Bayside (Humboldt County)
(pop: 17,100) --> Vedi sismi vicini17 km SO da McKinleyville (Humboldt County)
(pop: 15,200) --> Vedi sismi vicini26 km SSO da Westhaven-Moonstone
(pop: 1,210) --> Vedi sismi vicini28 km NNO da Fortuna (Humboldt County)
(pop: 12,000) --> Vedi sismi vicini39 km NNO da Rio Dell
(pop: 3,390) --> Vedi sismi vicini159 km O da Redding
(pop: 91,600) --> Vedi sismi vicini201 km SO da Medford (Oregon)
(pop: 79,800) --> Vedi sismi vicini
Fonte dati primaria: USGS
(United States Geological Survey)
Stima dell'energia sismica liberata: 2 x 109
joules (554 kilowatt hours, equivalent to 0.477 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.
|3.0||24 km||9km NW of Eureka, CA, USA||USGS|
|2.5||22 km||OFFSHORE NORTHERN CALIFORNIA, USA||EMSC|
|unknown||n/a||Near Eureka, California, USA||VolcanoDiscovery|
User reports for this quake (9)
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15.2 km ENE of epicenter [Map] / Very weak shaking (MMI II) / single lateral shake / very short : Im on the second floor and my bed and shelf shook. My parents, also on the second floor, felt nothing
11.9 km ESE of epicenter [Map] / Very weak shaking (MMI II) / 1-2 s
compton / Very weak shaking (MMI II) / complex rolling (tilting in multiple directions) / 5-10 s
Eureka, California (king salmon) / Light shaking (MMI IV) / single vertical bump / very short
14.1 km ENE of epicenter [Map] / Light shaking (MMI IV) / single lateral shake / 1-2 s : Felt one jolt like someone slammed a big door. Could have knocked things over if it went back and forth.
Kneeland, CA / Light shaking (MMI IV)
Arcata / Light shaking (MMI IV) / single lateral shake / 1-2 s
Arcata,ca / Light shaking (MMI IV) / single vertical bump / 2-5 s : Woke me up
Eureka / Very weak shaking (MMI II) / single lateral shake / very short : A single jolt as the house creaked.
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