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Minor earthquake: M2.88 quake has struck near Challis in Idaho


Earthquake location 44.2586667S, -114.5573333WA minor earthquake magnitude 2.88 (ml/mb) has struck on Thursday, 37 km SW of Challis, Idaho (23 miles). The epicenter of the earthquake was roughly 12.07 km (7 miles) below the earth’s surface. All ids that are associated to the event: mb80275539. Unique identifier: mb80275539. The 2.88-magnitude earthquake was detected at 04:31:32 / 4:31 am (local time epicenter). Exact time and date of event in UTC/GMT: 21/12/17 / 2017-12-21 11:31:32 / December 21, 2017 @ 11:31 am. Exact location, longitude -114.5573333° West, latitude 44.2586667° North, depth = 12.07 km.

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 one earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

Questions or comments?

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: 37 km SW of Challis, Idaho. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.88 mb The magnitude for the event.
Longitude -114.5573333° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 44.2586667° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 12.07 km Depth of the event in kilometers.
Place 37km SW of Challis, Idaho Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-12-21 11:31:32 Time when the event occurred. UTC/GMT
Updated 2017-12-21 15:16:37 Time when the event was most recently updated. UTC/GMT
Timezone offset -420 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 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 128 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network mb The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,mb, A comma-separated list of network contributors.
Number of Stations Used 18 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.704 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.28 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 107 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 mb80275539 Id of event.
Event Code 80275539 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,mb80275539, A comma-separated list of event ids that are associated to an event.

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