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Minor earthquake: M3.93 quake has struck near Petrolia in CA


Earthquake location 40.328834533691S, -124.71983337402WA minor earthquake magnitude 3.93 (ml/mb) has struck on Friday, 37 kilometers (23 miles) from Petrolia in CA. The temblor was reported at 07:01:50 / 7:01 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 06/12/24 / 2024-12-06 07:01:50 / December 6, 2024 @ 7:01 am. All ids that are associated to the event: nc75097271. Unique identifier: nc75097271. Exact location of earthquake, longitude -124.71983337402 West, latitude 40.328834533691 North, depth = 0.10999999940395 km. The epicenter of the earthquake was roughly 0.10999999940395 km (0 miles) below the earth’s surface.

Close country/countries, United States (c. 310 233 000 pop) (That might be effected). Event epicenter was 71 km (44 miles) from Eureka (c. 27 200 pop), 80 km (50 miles) from Arcata (c. 17 200 pop), 80 km (49 miles) from Bayside (c. 17 100 pop), 86 km (54 miles) from McKinleyville (c. 15 200 pop), 56 km (35 miles) from Fortuna (c. 11 900 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was McKinleyville, Arcata, Bayside.

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

Questions or comments?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 37 km WNW of Petrolia, CA. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.93 mb The magnitude for the event.
Longitude -124.71983337402° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 40.328834533691° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 0.10999999940395 km Depth of the event in kilometers.
Place 37 km WNW 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 2024-12-06 07:01:50 Time when the event occurred. UTC/GMT
Updated 2024-12-06 07:05:14 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 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 automatic 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 238 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 68 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.2913 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.19 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 234 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 nc75097271 Id of event.
Event Code 75097271 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc75097271, A comma-separated list of event ids that are associated to an event.

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