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Minor earthquake, 2.8 mag strikes near Petrolia in CA


Earthquake location 40.4345S, -125.2283333WA minor earthquake with magnitude 2.8 (ml/mb) was detected on Tuesday, 81 km W of Petrolia, CA (50 miles). Exact location of earthquake, longitude -125.2283333 West, latitude 40.4345 North, depth = 22.01 km. The epicenter was at a depth of 22.01 km (14 miles). The temblor was picked up at 09:39:57 / 9:39 am (local time epicenter). Global date and time of event UTC/GMT: 30/01/18 / 2018-01-30 17:39:57 / January 30, 2018 @ 5:39 pm. All ids that are associated to the event: nc72961441. Unique identifier: nc72961441.

In the past 24 hours, there have been 0, in the last 10 days four, in the past 30 days six and in the last 365 days fourty earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. Each year there are an estimated 1,300,000 minor quakes in the world.

Did you feel the quake?

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: 81 km W of Petrolia, CA.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -125.2283333° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 40.4345° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 22.01 km Depth of the event in kilometers.
Place 81km 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 2018-01-30 17:39:57 Time when the event occurred. UTC/GMT
Updated 2018-02-01 03:18:47 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 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 121 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 34 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.681 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.18 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 280 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type md The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID nc72961441 Id of event.
Event Code 72961441 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72961441, A comma-separated list of event ids that are associated to an event.

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