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Minor earthquake, 2.8 mag was detected near Helena Valley Northwest in Montana

Earthquake location 46.7993333S, -112.0195WA minor earthquake with magnitude 2.8 (ml/mb) was detected on Friday, 8 kilometers (5 miles) from Helena Valley Northwest in Montana. Event ids that are associated to the earthquake: mb80120229. Id of event: mb80120229. The earthquake occurred at a depth of 7.45 km (5 miles). The 2.8-magnitude earthquake has occurred at 06:50:07 / 6:50 am (local time epicenter). Exact location of earthquake, longitude -112.0195 West, latitude 46.7993333 North, depth = 7.45 km. Global date and time of event UTC/GMT: 15/01/16 / 2016-01-15 13:50:07 / January 15, 2016 @ 1:50 pm.

Epicenter of the earthquake was 23 km (14 miles) from Helena (c. 28 200 pop), 22 km (14 miles) from Helena Valley Southeast (c. 8 200 pop), 15 km (10 miles) from Helena Valley West Central (c. 7 900 pop). Nearby country/countries, United States (c. 310 233 000 pop) (That might be effected). Nearest cities/city/towns to hypocenter/epicentrum was Helena, Helena Valley Southeast, Helena Valley West Central (min 5000 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 five 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. Each year there are an estimated 1,300,000 minor quakes in the world.

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. 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: 8 km NNE of Helena Valley Northwest, Montana.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -112.0195° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 46.7993333° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 7.45 km Depth of the event in kilometers.
Place 8km NNE of Helena Valley Northwest, Montana Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-01-15 13:50:07 Time when the event occurred. UTC/GMT
Updated 2016-01-15 14:55:04 Time when the event was most recently updated. UTC/GMT
Timezone offset -420 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 121 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 23 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.157 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.12 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 171 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 mb80120229 Id of event.
Event Code 80120229 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,mb80120229, A comma-separated list of event ids that are associated to an event.

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