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Minor earthquake: M3.71 quake has struck near Petrolia in CA


Earthquake location 40.2996674S, -124.3743362WA minor earthquake magnitude 3.71 (ml/mb) has struck on Thursday, 8 kilometers (5 miles) from Petrolia in CA. The epicenter of the earthquake was roughly 7.95 km (5 miles) below the earth’s surface. Id of earthquake: nc73336226. Event ids that are associated: nc73336226. The temblor was reported at 00:20:24 / 12:20 am (local time epicenter). Exact location of event, depth 7.95 km, -124.3743362° West, 40.2996674° North. Global date and time of event UTC/GMT: 06/02/20 / 2020-02-06 08:20:24 / February 6, 2020 @ 8:20 am.

The epicenter was 59 km (36 miles) from Eureka (c. 27 200 pop), 68 km (42 miles) from Arcata (c. 17 200 pop), 66 km (41 miles) from Bayside (c. 17 100 pop), 76 km (47 miles) from McKinleyville (c. 15 200 pop), 38 km (24 miles) from Fortuna (c. 11 900 pop). Nearest cities/city/villages to epicentrum/hypocenter was McKinleyville, Arcata, Bayside (min 5000 pop). Nearby country/countries that might be effected, United States (c. 310 233 000 pop).

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days six and in the last 365 days fourty-nine earthquakes of magnitude 3.0 or greater that have been detected nearby. Every year there are an estimated 130,000 minor earthquakes in the world.

How would you describe the shaking?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 8 km WSW of Petrolia, CA.

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More information

Parameter Value Description
Magnitude 3.71 mb The magnitude for the event.
Longitude -124.3743362° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 40.2996674° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 7.95 km Depth of the event in kilometers.
Place 8km WSW of Petrolia, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-02-06 08:20:24 Time when the event occurred. UTC/GMT
Updated 2020-02-06 08:26:15 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI 3.4 The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status reviewed Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 212 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network nc The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,nc, A comma-separated list of network contributors.
Number of Stations Used 16 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.02675 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.12 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 252 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID nc73336226 Id of event.
Event Code 73336226 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc73336226, A comma-separated list of event ids that are associated to an event.

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