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Minor earthquake 2.82 mag, 22 km SSE of Townsend, Montana



Earthquake location 46.1291667S, -111.4403333WA minor earthquake with magnitude 2.82 (ml/mb) was reported 22 kilometers (14 miles) from Townsend in Montana on Thursday. Event id: mb80245879. Ids that are associated to the earthquake: mb80245879. Exact location of event, longitude -111.4403333 West, latitude 46.1291667 North, depth = 3.99 km. The earthquake occurred at a depth of 3.99 km (2 miles). Exact time and date of earthquake 17/08/17 / 2017-08-17 11:51:58 / August 17, 2017 @ 11:51 am UTC/GMT. The temblor was reported at 04:51:58 / 4:51 am (local time epicenter).

Close country/countries that might be effected, United States (c. 310 233 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Helena Valley West Central, Helena, Helena Valley Southeast (min 5000 pop). Event epicenter was 59 km (37 miles) from Bozeman (c. 37 300 pop), 69 km (43 miles) from Helena (c. 28 200 pop), 65 km (41 miles) from Helena Valley Southeast (c. 8 200 pop), 76 km (47 miles) from Helena Valley West Central (c. 7 900 pop), 44 km (27 miles) from Belgrade (c. 7 400 pop).

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 one and in the last 365 days fourteen earthquakes of magnitude 3.0 or greater that has occurred nearby. There are an estimated 1,300,000 minor quakes in the world each year.

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 22 km SSE of Townsend, Montana.

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More information

Parameter Value Description
Magnitude 2.82 mb The magnitude for the event.
Longitude -111.4403333° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 46.1291667° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 3.99 km Depth of the event in kilometers.
Place 22km SSE of Townsend, Montana Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-08-17 11:51:58 Time when the event occurred. UTC/GMT
Updated 2017-08-17 14:00:19 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 122 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 38 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.162 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.23 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 106 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 mb80245879 Id of event.
Event Code 80245879 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,mb80245879, A comma-separated list of event ids that are associated to an event.

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