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Light earthquake: M4.48 quake has struck near Petrolia in CA


Earthquake location 40.3191681S, -124.6279984WA light earthquake with magnitude 4.48 (ml/mb) was detected on Thursday, 29 kilometers (18 miles) from Petrolia in CA. Exact location of earthquake, longitude -124.6279984 West, latitude 40.3191681 North, depth = 13.22 km. The 4.48-magnitude earthquake was detected at 22:01:27 / 10:01 pm (local time epicenter). A tsunami warning has been issued near Petrolia in CA (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: nc72981481, at00p5b7ea. Id of event: nc72981481. The earthquake occurred at a depth of 13.22 km (8 miles) below the earth’s surface. Global date and time of event UTC/GMT: 09/03/18 / 2018-03-09 06:01:27 / March 9, 2018 @ 6:01 am.

Nearby country/countries, United States (c. 310 233 000 pop) (That might be effected). Nearest cities/city/towns to hypocenter/epicentrum was McKinleyville, Arcata, Bayside (min 5000 pop). Event epicenter was 66 km (41 miles) from Eureka (c. 27 200 pop), 76 km (47 miles) from Arcata (c. 17 200 pop), 75 km (47 miles) from Bayside (c. 17 100 pop), 83 km (51 miles) from McKinleyville (c. 15 200 pop), 50 km (31 miles) from Fortuna (c. 11 900 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light quakes in the world each year. In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days two and in the last 365 days thirty-seven earthquakes of magnitude 3.0 or greater that has occurred nearby.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 29 km W of Petrolia, CA. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.48 mb The magnitude for the event.
Longitude -124.6279984° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 40.3191681° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 13.22 km Depth of the event in kilometers.
Place 29km 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 2018-03-09 06:01:27 Time when the event occurred. UTC/GMT
Updated 2018-03-09 06:16:07 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 103 The total number of felt reports
CDI 4.1 The maximum reported intensity for the event.
MMI 3.1 The maximum estimated instrumental intensity for the event.
Alert Level green 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 1 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 351 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,at, 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 0.2628 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 251 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mw The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID nc72981481 Id of event.
Event Code 72981481 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72981481,at00p5b7ea, A comma-separated list of event ids that are associated to an event.

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