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Light earthquake, 4.16 mag strikes near Petrolia in CA

Earthquake location 40.4323349S, -124.430336WA light earthquake with magnitude 4.16 (ml/mb) was detected on Thursday, 17 kilometers (11 miles) from Petrolia in CA. Exact location of event, longitude -124.430336 West, latitude 40.4323349 North, depth = 24.98 km. Global time and date of event 29/03/19 / 2019-03-29 04:55:26 / March 29, 2019 @ 4:55 am UTC/GMT. The temblor was picked up at 20:55:26 / 8:55 pm (local time epicenter). Unique identifier: nc73157855. Ids that are associated to the event: at00pp430e, nc73157855. A tsunami warning has been issued near Petrolia in CA (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 24.98 km (16 miles).

Event epicenter was 47 km (29 miles) from Eureka (c. 27 200 pop), 56 km (35 miles) from Arcata (c. 17 200 pop), 55 km (34 miles) from Bayside (c. 17 100 pop), 64 km (40 miles) from McKinleyville (c. 15 200 pop), 30 km (18 miles) from Fortuna (c. 11 900 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was McKinleyville, Arcata, Bayside. Country/countries that might be effected, United States (c. 310 233 000 pop).

In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days five and in the last 365 days fifty-five earthquakes of magnitude 3.0 or greater that has occurred nearby. 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.

How would you describe the shaking?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 17 km NW of Petrolia, CA.

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More information

Parameter Value Description
Magnitude 4.16 mb The magnitude for the event.
Longitude -124.430336° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 40.4323349° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 24.98 km Depth of the event in kilometers.
Place 17km NW 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 2019-03-29 04:55:26 Time when the event occurred. UTC/GMT
Updated 2019-03-29 05:00:00 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 3 The total number of felt reports
CDI 3.4 The maximum reported intensity for the event.
MMI 4.36 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 automatic 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 267 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 ,at,nc, A comma-separated list of network contributors.
Number of Stations Used 18 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.08298 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.16 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 227 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 nc73157855 Id of event.
Event Code 73157855 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,at00pp430e,nc73157855, A comma-separated list of event ids that are associated to an event.

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