Minor earthquake, 3.91 mag was detected near Three Forks in Montana

A minor earthquake magnitude 3.91 (ml/mb) has struck on Wednesday, 7 kilometers (4 miles) from Three Forks in Montana. The temblor was detected at 21:59:01 / 9:59 pm (local time epicenter). Exact time and date of event in UTC/GMT: 12/01/17 / 2017-01-12 04:59:01 / January 12, 2017 @ 4:59 am. The epicenter was at a depth of 18.03 km (11 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, longitude -111.7125015 West, latitude 45.8328323 North, depth = 18.03 km. All ids that are associated to the event: mb80196459, us10007srq. Unique identifier: mb80196459.

Epicenter of the earthquake was 55 km (34 miles) from Bozeman (c. 37 300 pop), 66 km (41 miles) from Butte (c. 34 200 pop), 74 km (46 miles) from Butte-Silver Bow (Balance) (c. 33 500 pop), 88 km (55 miles) from Helena (c. 28 200 pop), 88 km (55 miles) from Helena Valley Southeast (c. 8 200 pop), 42 km (26 miles) from Belgrade (c. 7 400 pop). Close country/countries that might be effected, United States (c. 310 233 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Helena Valley Southeast, Helena, Butte-Silver Bow (Balance) (min 5000 pop).

Each year there are an estimated 130,000 minor quakes in the world. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days fourteen earthquakes of magnitude 3.0 or greater that has occurred nearby.

Questions or comments?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 7 km SW of Three Forks, Montana. This information comes from the USGS Earthquake Notification Service.

More information

Parameter	Value	Description
Magnitude	3.91 mb	The magnitude for the event.
Longitude	-111.7125015° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	45.8328323° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	18.03 km	Depth of the event in kilometers.
Place	7km SW of Three Forks, Montana	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2017-01-12 04:59:01	Time when the event occurred. UTC/GMT
Updated	2017-01-12 05:18:39	Time when the event was most recently updated. UTC/GMT
Timezone offset	-420	Timezone offset from UTC in minutes at the event epicenter.
Felt	4	The total number of felt reports
CDI	3.8	The maximum reported intensity for the event.
MMI	3.32	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	237	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,us,	A comma-separated list of network contributors.
Number of Stations Used		The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance		Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap		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	mb80196459	Id of event.
Event Code	80196459	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,mb80196459,us10007srq,	A comma-separated list of event ids that are associated to an event.

Parameter

Value

Description

Magnitude

3.91 mb

The magnitude for the event.

Longitude

-111.7125015° West

Decimal degrees longitude. Negative values for western longitudes.

Latitude

45.8328323° North

Decimal degrees latitude. Negative values for southern latitudes.

Depth

18.03 km

Depth of the event in kilometers.

Place

7km SW of Three Forks, Montana

Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.

Time

2017-01-12 04:59:01

Time when the event occurred. UTC/GMT

Updated

2017-01-12 05:18:39

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

3.8

The maximum reported intensity for the event.

MMI

3.32

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

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

237

A number describing how significant the event is. Larger numbers indicate a more significant event.

Network

The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.

Sources

,mb,us,

A comma-separated list of network contributors.

Number of Stations Used

The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.

Horizontal Distance

Horizontal distance from the epicenter to the nearest station (in degrees).

Root Mean Square

sec

The root-mean-square (RMS) travel time residual, in sec, using all weights.

Azimuthal Gap

The largest azimuthal gap between azimuthally adjacent stations (in degrees).

Magnitude Type

The method or algorithm used to calculate the preferred magnitude for the event.

Event Type

earthquake

Type of seismic event.

Event ID

mb80196459

Id of event.

Event Code

80196459

An identifying code assigned by, and unique from, the corresponding source for the event.

Event IDS

,mb80196459,us10007srq,

A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.91 mag was detected near Three Forks in Montana

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