Minor earthquake, 3.72 mag strikes near Petrolia in CA

A minor earthquake magnitude 3.72 (ml/mb) strikes 32 kilometers (20 miles) from Petrolia in CA on Sunday. The epicenter was at a depth of 16.16 km (10 miles). Event id: nc73440191. Ids that are associated to the earthquake: nc73440191. Global time and date of event 09/08/20 / 2020-08-09 00:00:35 / August 9, 2020 @ 12:00 am UTC/GMT. Exact location, longitude -124.6671677° West, latitude 40.3138351° North, depth = 16.16 km. The 3.72-magnitude earthquake was detected at 00:00:35 / 12:00 am (local time epicenter).

Epicenter of the earthquake was 69 km (43 miles) from Eureka (c. 27 200 pop), 79 km (49 miles) from Arcata (c. 17 200 pop), 78 km (48 miles) from Bayside (c. 17 100 pop), 85 km (53 miles) from McKinleyville (c. 15 200 pop), 53 km (33 miles) from Fortuna (c. 11 900 pop). Closest city/cities/towns to epicentrum/hypocenter was McKinleyville, Arcata, Bayside (min 5000 pop). Close 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 one, in the past 30 days two and in the last 365 days fourty-seven earthquakes of magnitude 3.0 or greater that have been detected nearby. There are an estimated 130,000 minor quakes in the world each year.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 32 km W of Petrolia, CA.

More information

Parameter	Value	Description
Magnitude	3.72 mb	The magnitude for the event.
Longitude	-124.6671677° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	40.3138351° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	16.16 km	Depth of the event in kilometers.
Place	32km W 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	2020-08-09 00:00:35	Time when the event occurred. UTC/GMT
Updated	2020-08-09 00:07:58	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt	0	The total number of felt reports
CDI	1	The maximum reported intensity for the event.
MMI	2.92	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	213	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	44	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.2495	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.14 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	259	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	nc73440191	Id of event.
Event Code	73440191	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc73440191,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.72 mag strikes near Petrolia in CA

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