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Minor earthquake 2.8 mag, 8 km E of Portola, California



Earthquake location 39.8336678S, -120.3669968WA minor earthquake magnitude 2.8 (ml/mb) has struck on Wednesday, 8 kilometers (5 miles) from Portola in California. Exact time and date of event in UTC/GMT: 29/11/17 / 2017-11-29 10:37:46 / November 29, 2017 @ 10:37 am. All ids that are associated to the event: nc72932165, nn00613839. Unique identifier: nc72932165. The earthquake was roughly at a depth of 9.25 km (6 miles). Exact location of earthquake, -120.3669968° West, 39.8336678° North, depth 9.25 km. The 2.8-magnitude earthquake has occurred at 02:37:46 / 2:37 am (local time epicenter).

Event epicenter was 58 km (36 miles) from Reno (c. 225 200 pop), 62 km (39 miles) from Sparks (c. 90 300 pop), 57 km (35 miles) from Sun Valley (c. 19 300 pop), 69 km (43 miles) from Susanville (c. 17 900 pop), 58 km (36 miles) from Truckee (c. 16 200 pop). Country/countries that might be effected, United States (c. 310 233 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Incline Village, Susanville, Sparks.

Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. 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 ten earthquakes of magnitude 3.0 or greater that was reported nearby. There are an estimated 1,300,000 minor quakes 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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 8 km E of Portola, California. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -120.3669968° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 39.8336678° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 9.25 km Depth of the event in kilometers.
Place 8km E of Portola, California Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-11-29 10:37:46 Time when the event occurred. UTC/GMT
Updated 2017-11-29 10:40:23 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 121 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,nn, A comma-separated list of network contributors.
Number of Stations Used 15 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.03338 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.07 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 88 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 nc72932165 Id of event.
Event Code 72932165 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72932165,nn00613839, A comma-separated list of event ids that are associated to an event.

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