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Minor earthquake: M2.87 quake has struck near Ferndale in California

Earthquake location 40.3995S, -126.9836667WA minor earthquake with magnitude 2.87 (ml/mb) was reported 231 km W of Ferndale, California (144 miles) on Friday. Exact location of event, longitude -126.9836667 West, latitude 40.3995 North, depth = 16.96 km. The 2.87-magnitude earthquake was detected at 13:53:16 / 1:53 pm (local time epicenter). The earthquake occurred at a depth of 16.96 km (11 miles) below the earth’s surface. All ids that are associated to the event: nc72897086. Unique identifier: nc72897086. Exact time and date of earthquake 22/09/17 / 2017-09-22 21:53:16 / September 22, 2017 @ 9:53 pm UTC/GMT.

In the past 24 hours, there have been four, in the last 10 days four, in the past 30 days five and in the last 365 days twenty-five 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 earthquakes in the world.

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: 231 km W of Ferndale, California.

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More information

Parameter Value Description
Magnitude 2.87 mb The magnitude for the event.
Longitude -126.9836667° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 40.3995° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 16.96 km Depth of the event in kilometers.
Place 231km W of Ferndale, California Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-09-22 21:53:16 Time when the event occurred. UTC/GMT
Updated 2017-09-23 02:27:04 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 127 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 5 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.064 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.15 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 357 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 nc72897086 Id of event.
Event Code 72897086 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72897086, A comma-separated list of event ids that are associated to an event.

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