Minor earthquake, 3.8 mag strikes near Petrolia in CA

A minor earthquake with magnitude 3.8 (ml/mb) was detected on Thursday, 20 kilometers (12 miles) from Petrolia in CA. The epicenter of the earthquake was roughly 19.29 km (12 miles) below the earth’s surface. The 3.8-magnitude earthquake was detected at 20:45:42 / 8:45 pm (local time epicenter). Global date and time of event UTC/GMT: 29/12/17 / 2017-12-29 04:45:42 / December 29, 2017 @ 4:45 am. Event id: nc72945446. Ids that are associated to the earthquake: nc72945446. Exact location of event, longitude -124.5210037 West, latitude 40.2978325 North, depth = 19.29 km.

Nearby country/countries, United States (c. 310 233 000 pop) (That might be effected). Epicenter of the event was 64 km (40 miles) from Eureka (c. 27 200 pop), 73 km (46 miles) from Arcata (c. 17 200 pop), 72 km (45 miles) from Bayside (c. 17 100 pop), 80 km (50 miles) from McKinleyville (c. 15 200 pop), 45 km (28 miles) from Fortuna (c. 11 900 pop). Nearest cities/city/towns to hypocenter/epicentrum was McKinleyville, Arcata, Bayside (min 5000 pop).

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

Did you feel it?

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 20 km W of Petrolia, CA.

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Parameter	Value	Description
Magnitude	3.8 mb	The magnitude for the event.
Longitude	-124.5210037° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	40.2978325° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	19.29 km	Depth of the event in kilometers.
Place	20km 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	2017-12-29 04:45:42	Time when the event occurred. UTC/GMT
Updated	2017-12-29 05:01:03	Time when the event was most recently updated. UTC/GMT
Timezone offset	-480	Timezone offset from UTC in minutes at the event epicenter.
Felt	6	The total number of felt reports
CDI	3.3	The maximum reported intensity for the event.
MMI	2.21	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	224	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	25	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.1994	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.07 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	240	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	nc72945446	Id of event.
Event Code	72945446	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc72945446,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.8 mag strikes near Petrolia in CA

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