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Minor earthquake: M3.35 quake has struck near Upper Lake in CA


Earthquake location 39.3011665S, -122.7685013WA minor earthquake with magnitude 3.35 (ml/mb) was detected on Friday, 20 kilometers (12 miles) from Upper Lake in CA. Date and time of earthquake in UTC/GMT: 04/05/18 / 2018-05-04 20:26:00 / May 4, 2018 @ 8:26 pm. The temblor was detected at 12:26:00 / 12:26 pm (local time epicenter). Unique identifier: nc73010506. Ids that are associated to the event: nc73010506. The epicenter of the earthquake was roughly 13.05 km (8 miles) below the earth’s surface. Exact location of event, depth 13.05 km, -122.7685013° West, 39.3011665° North.

Event epicenter was 41 km (26 miles) from Ukiah (c. 16 100 pop), 40 km (25 miles) from Clearlake (c. 15 300 pop), 77 km (48 miles) from Healdsburg (c. 11 300 pop), 59 km (37 miles) from Cloverdale (c. 8 600 pop), 70 km (43 miles) from Orland (c. 7 300 pop). Nearest cities/city/towns to hypocenter/epicentrum was Calistoga, Healdsburg, Orland (min 5000 pop). Nearby country/countries that might be effected, United States (c. 310 233 000 pop).

Each year there are an estimated 130,000 minor quakes in the world. 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 twenty-six earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 20 km NE of Upper Lake, CA.

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More information

Parameter Value Description
Magnitude 3.35 mb The magnitude for the event.
Longitude -122.7685013° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 39.3011665° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 13.05 km Depth of the event in kilometers.
Place 20km NE of Upper Lake, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-05-04 20:26:00 Time when the event occurred. UTC/GMT
Updated 2018-05-04 20:34:57 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 4 The total number of felt reports
CDI 2.7 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 174 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 41 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.1285 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.16 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 37 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 nc73010506 Id of event.
Event Code 73010506 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc73010506, A comma-separated list of event ids that are associated to an event.

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