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Minor earthquake 2.83 mag, 13 km NW of Viola, CA



Earthquake location 40.5940018S, -121.7923355WA minor earthquake with magnitude 2.83 (ml/mb) was reported 13 kilometers (8 miles) from Viola in CA on Sunday. Exact location of event, depth 17.12 km, -121.7923355° West, 40.5940018° North. The temblor was reported at 22:28:20 / 10:28 pm (local time epicenter). The earthquake occurred at a depth of 17.12 km (11 miles). Event id: nc72938311. Ids that are associated to the earthquake: nc72938311. Date and time of earthquake in UTC/GMT: 11/12/17 / 2017-12-11 06:28:20 / December 11, 2017 @ 6:28 am.

Closest city/cities/towns to epicentrum/hypocenter was Red Bluff, Redding, Shasta Lake (min 5000 pop). Country/countries that might be effected, United States (c. 310 233 000 pop). Earthquake epicenter was 51 km (31 miles) from Redding (c. 89 900 pop), 60 km (37 miles) from Red Bluff (c. 14 100 pop), 50 km (31 miles) from Shasta Lake (c. 10 200 pop), 46 km (28 miles) from Anderson (c. 9 900 pop).

In the past 24 hours, there have been 0, in the last 10 days 0, in the past 30 days 0 and in the last 365 days six earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. There are an estimated 1,300,000 minor earthquakes in the world each year.

Did you feel the quake?

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 13 km NW of Viola, CA.

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More information

Parameter Value Description
Magnitude 2.83 mb The magnitude for the event.
Longitude -121.7923355° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 40.5940018° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 17.12 km Depth of the event in kilometers.
Place 13km NW of Viola, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-12-11 06:28:20 Time when the event occurred. UTC/GMT
Updated 2017-12-11 06:33:04 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 2 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 123 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 26 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.1282 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.1 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 61 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 nc72938311 Id of event.
Event Code 72938311 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72938311, A comma-separated list of event ids that are associated to an event.

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