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Minor earthquake 2.82 mag, 4 km W of Cobb, CA


Earthquake location 38.8258324S, -122.7653351WA minor earthquake magnitude 2.82 (ml/mb) has struck on Saturday, 4 kilometers (2 miles) from Cobb in CA. The earthquake was roughly at a depth of 1.73 km (1 miles). The 2.82-magnitude earthquake was detected at 01:39:28 / 1:39 am (local time epicenter). Exact location of earthquake, -122.7653351° West, 38.8258324° North, depth 1.73 km. Unique identifier: nc73144826. Ids that are associated to the event: nc73144826. Exact time and date of event in UTC/GMT: 23/02/19 / 2019-02-23 09:39:28 / February 23, 2019 @ 9:39 am.

Event epicenter was 43 km (27 miles) from Santa Rosa (c. 167 800 pop), 72 km (45 miles) from Napa (c. 76 900 pop), 67 km (42 miles) from Petaluma (c. 57 900 pop), 54 km (34 miles) from Rohnert Park (c. 41 000 pop), 31 km (19 miles) from Windsor (c. 26 800 pop). Closest city/cities/towns to epicentrum/hypocenter was Winters, Napa, Petaluma (min 5000 pop). Country/countries that might be effected, United States (c. 310 233 000 pop).

Each year there are an estimated 1,300,000 minor quakes in the world. In the past 24 hours, there have been 0, in the last 10 days one, in the past 30 days one and in the last 365 days thirty 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.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. 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: 4 km W of Cobb, CA.

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More information

Parameter Value Description
Magnitude 2.82 mb The magnitude for the event.
Longitude -122.7653351° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 38.8258324° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 1.73 km Depth of the event in kilometers.
Place 4km W of Cobb, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2019-02-23 09:39:28 Time when the event occurred. UTC/GMT
Updated 2019-02-23 09:44:07 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 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 automatic 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 122 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 33 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.005851 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.04 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 59 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 nc73144826 Id of event.
Event Code 73144826 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc73144826, A comma-separated list of event ids that are associated to an event.

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