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Minor earthquake: M2.85 quake has struck near Point Arena in California



Earthquake location 38.844S, -123.6213333WA minor earthquake with magnitude 2.85 (ml/mb) was reported 9 kilometers (6 miles) from Point Arena in California on Tuesday. Global time and date of event 21/02/17 / 2017-02-21 13:28:06 / February 21, 2017 @ 1:28 pm UTC/GMT. Unique identifier: nc72766286. Ids that are associated to the event: nc72766286. The 2.85-magnitude earthquake has occurred at 05:28:06 / 5:28 am (local time epicenter). Exact location of earthquake, longitude -123.6213333 West, latitude 38.844 North, depth = 7.08 km. The epicenter of the earthquake was roughly 7.08 km (4 miles) below the earth’s surface.

Nearby country/countries, United States (c. 310 233 000 pop) (That might be effected). Epicenter of the earthquake was 49 km (31 miles) from Ukiah (c. 16 100 pop), 70 km (44 miles) from Healdsburg (c. 11 300 pop), 53 km (33 miles) from Cloverdale (c. 8 600 pop), 69 km (43 miles) from Fort Bragg (c. 7 300 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Healdsburg, Fort Bragg, Cloverdale.

There are an estimated 1,300,000 minor earthquakes in the world each year. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days four and in the last 365 days fourty-seven earthquakes of magnitude 3.0 or greater that have been detected in the same area.

How would you describe the shaking?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 9 km SE of Point Arena, California. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.85 mb The magnitude for the event.
Longitude -123.6213333° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 38.844° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 7.08 km Depth of the event in kilometers.
Place 9km SE of Point Arena, California Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-02-21 13:28:06 Time when the event occurred. UTC/GMT
Updated 2017-02-22 02:38:01 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 16 The total number of felt reports
CDI 4 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 131 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 38 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.1885 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.12 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 220 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 nc72766286 Id of event.
Event Code 72766286 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72766286, A comma-separated list of event ids that are associated to an event.

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