Important historic earthquakes (until 2013) in Montana, USA

The list of the 50 most recent earthquakes in this state can be found at the bottom of this page.

Screen Shot 2014-04-28 at 19.28.17

Click on this image to watch it in full size - Data courtesy NOAA Natural Hazards database

TSU - means that a tsunami (or in this case strong river waves) were triggered


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Label info : M = magnitude, D = depth (km), Time = UTC time

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SRC Location UTC Date/time M D INFO
USGS Cut Bank, Montana Oct 22 14:12 3.1 2 MAP I Felt It INFO
USGS Cut Bank, Montana Oct 22 14:12 3.1 5 MAP
USGS Lincoln, Montana Oct 20 09:01 2.5 14 MAP
USGS Manhattan, Montana Oct 17 01:03 2.5 5 MAP
USGS Manhattan, Montana Oct 16 16:46 3.3 5 MAP
EMSC Western Montana Oct 16 16:46 3.5 5 MAP I Felt It INFO
USGS Manhattan, Montana Oct 16 12:49 2.5 3 MAP
USGS Helena Valley Northwest, Montana Oct 15 20:50 2.6 2 MAP
USGS Western Montana Oct 10 11:53 2.8 5 MAP I Felt It INFO
USGS West Yellowstone, Montana Oct 04 08:47 2.7 9 MAP
USGS Lincoln, Montana Sep 24 03:50 2.7 9 MAP I Felt It INFO
USGS Seeley Lake, Montana Sep 08 05:28 2.8 22 MAP I Felt It INFO
USGS Lima, Montana Aug 27 08:22 2.9 6 MAP I Felt It INFO
USGS Lima, Montana Aug 22 18:06 2.5 7 MAP
USGS Clinton, Montana Aug 11 06:46 2.7 11 MAP
USGS Clinton, Montana Aug 11 06:04 3.7 11 MAP
EMSC Western Montana Aug 11 06:04 3.7 11 MAP I Felt It INFO
USGS Whitehall, Montana Jul 24 06:18 3.0 7 MAP I Felt It INFO
  • Spokane - Felt mild shaking for approximately ten seconds while laying in bed.
  • EMSC Western Montana Jul 24 04:56 3.7 6 MAP
    USGS Whitehall, Montana Jul 24 04:56 3.7 7 MAP I Felt It INFO
    USGS Boulder, Montana Jul 17 20:44 2.6 6 MAP
    USGS Western Montana Jul 06 17:30 2.8 10 MAP
    EMSC Western Montana Jul 06 17:30 3.1 3 MAP I Felt It INFO
    USGS Whitehall, Montana Jul 02 19:03 3.3 13 MAP
    EMSC Western Montana Jul 02 19:03 3.5 8 MAP I Felt It INFO
  • Clancy - Brief shaking-2 to 3 seconds-no damage
  • USGS Lincoln, Montana Jun 25 05:14 2.8 12 MAP I Felt It INFO
    USGS Lincoln, Montana Jun 15 23:30 2.7 14 MAP I Felt It INFO
    USGS Lincoln, Montana May 30 09:10 3.0 12 MAP I Felt It INFO
    EMSC Eastern Montana May 25 09:56 3.0 7 MAP
    USGS Broadus, Montana May 25 09:56 3.0 6 MAP I Felt It INFO
    USGS West Yellowstone, Montana May 25 08:04 2.6 9 MAP
    EMSC Western Montana May 14 11:13 3.5 13 MAP I Felt It INFO
    EMSC Western Montana May 14 11:11 3.7 13 MAP I Felt It INFO
    USGS West Yellowstone, Montana May 06 14:54 3.1 11 MAP I Felt It INFO
    USGS Lame Deer, Montana Apr 22 18:54 2.7 8 MAP I Felt It INFO
    USGS Lincoln, Montana Apr 20 21:37 3.0 11 MAP I Felt It INFO
    USGS Lincoln, Montana Apr 20 21:37 2.6 11 MAP
    EMSC Western Montana Apr 20 21:37 3.0 11 MAP I Felt It INFO
    EMSC Western Montana Apr 19 23:16 2.9 9 MAP
    USGS Lincoln, Montana Apr 19 23:16 2.9 9 MAP I Felt It INFO
    USGS Lincoln, Montana Apr 17 11:41 2.7 11 MAP
    USGS Lincoln, Montana Apr 17 11:11 4.3 10 MAP I Felt It INFO
    USGS Lincoln, Montana Apr 17 11:11 3.8 15 MAP
    EMSC Western Montana Apr 17 11:11 4.3 11 MAP I Felt It INFO
    USGS Lincoln, Montana Apr 14 17:15 2.9 12 MAP I Felt It INFO
    EMSC Western Montana Apr 13 00:11 3.7 11 MAP
    USGS Lima, Montana Apr 13 00:11 3.5 5 MAP I Felt It INFO
    USGS Whitefish, Montana Apr 10 10:42 3.5 10 MAP
    EMSC Western Montana Apr 10 10:42 3.2 11 MAP I Felt It INFO
  • Edmonton - Awoke in my bed and noticed very slight rocking for a count in the seconds. Went back to sleep and searched for any earthquakes in the area first thing in the morning.
  • USGS Whitefish, Montana Apr 10 10:42 3.2 11 MAP I Felt It INFO

    Data sources courtesy : USGSEMSCGFZGEONET

    SHARE YOUR EARTHQUAKE EXPERIENCE WITH US

    I felt the shaking *
    Country where you felt the earthquake *
    City/Village where you felt the earthquake *
    Street or suburb (area) where you felt the earthquake
    Latitude (area) where you felt the earthquake
    Longitude (area) where you felt the earthquake
    Shaking Strength *
    MMI II (Very weak shaking) ?
    People :
    Felt by persons at rest, on upper floors or favorably placed.
    MMI III (Weak shaking) ?
    People :
    Felt indoors; hanging objects may swing, vibration similar to passing of light trucks, duration may be estimated, may not be recognized as an earthquake.
    MMI IV (Light shaking) ?
    People :
    Generally noticed indoors but not outside. Light sleepers may be awakened. Vibration may be likened to the passing of heavy traffic, or to the jolt of a heavy object falling or striking the building.
    Fittings :
    Doors and windows rattle. Glassware and crockery rattle. Liquids in open vessels may be slightly disturbed. Standing motorcars may rock.
    Structures :
    Walls and frames of buildings, and partitions and suspended ceilings in commercial buildings, may be heard to creak.
    MMI V (Moderate shaking) ?
    People :
    Generally felt outside, and by almost everyone indoors. Most sleepers awakened. A few people alarmed.
    Fittings :
    Small unstable objects are displaced or upset. Some glassware and crockery may be broken. Hanging pictures knock against the wall. Open doors may swing. Cupboard doors secured by magnetic catches may open. Pendulum clocks stop, start, or change rate.
    Structures :
    Some large display windows cracked. A few earthenware toilet fixtures cracked.
    MMI VI (Strong shaking) ?
    People Felt by all. People and animals alarmed. Many run outside. Difficulty experienced in walking steadily.
    Fittings :
    Objects fall from shelves. Pictures fall from walls. Some furniture moved on smooth floors, some unsecured free-standing fireplaces moved. Glassware and crockery broken. Very unstable furniture overturned. Small church and school bells ring. Appliances move on bench or table tops. Filing cabinets or "easy glide" drawers may open (or shut).
    Structures :
    Slight damage to buildings with low standard. Some stucco or cement plaster falls. Large display windows broken. Damage to a few weak domestic chimneys, some may fall.
    Environment :
    Trees and bushes shake, or are heard to rustle. Loose material may be dislodged from sloping ground, e.g. existing slides, talus slopes, shingle slides.
    MMI VII (Very strong shaking) ?
    People
    General alarm. Difficulty experienced in standing. Noticed by motorcar drivers who may stop.
    Fittings :
    Large bells ring. Furniture moves on smooth floors, may move on carpeted floors. Substantial damage to fragile contents of buildings.
    Structures :
    Unreinforced stone and brick walls cracked. Low standard buildings cracked with some minor masonry falls. A few instances of damage to buildings of ordinary workmanship. Unbraced parapets, unbraced brick gables, and architectural ornaments fall. Roofing tiles, especially ridge tiles may be dislodged. Many unreinforced domestic chimneys damaged, often falling from roof-line. Water tanks Type I burst. A few instances of damage to brick veneers and plaster or cement-based linings. Unrestrained water cylinders (hot-water cylinders) may move and leak. Some common windows cracked. Suspended ceilings damaged.
    Environment :
    Water made turbid by stirred up mud. Small slides such as falls of sand and gravel banks, and small rock-falls from steep slopes and cuttings. Instances of settlement of unconsolidated or wet, or weak soils. Some fine cracks appear in sloping ground. A few instances of liquefaction (i.e. small water and sand ejections).
    MMI VIII (Severe shaking) ?
    People Alarm may approach panic. Steering of motorcars greatly affected. Structures : Low standard buildings heavily damaged, some collapse. ordinary workmanship buildings damaged, some with partial collapse. Reinforced masonry or concrete buildings damaged in some cases. A few instances of damage to buildings and bridges designed and built to resist earthquakes. Monuments and pre-1976 elevated tanks and factory stacks twisted or brought down. Some pre-1965 infill masonry panels damaged. A few post-1980 brick veneers damaged. Decayed timber piles of houses damaged. Houses not secured to foundations may move. Most unreinforced domestic chimneys damaged, some below roof-line, many brought down. Environment : Cracks appear on steep slopes and in wet ground. Small to moderate slides in roadside cuttings and unsupported excavations. Small water and sand ejections and localized lateral spreading adjacent to streams, canals, lakes, etc.
    MMI IX (Violent shaking) ?
    Structures Many low standard buildings destroyed. Ordinary workmanship buildings heavily damaged, some collapse. Reinforced masonry or concrete buildings damaged, some with partial collapse. Buildings and bridges designed and built to resist earthquakes damaged in some cases, some with flexible frames seriously damaged. Damage or permanent distortion to some buildings and bridges, designed and built to normal use standards. Houses not secured to foundations shifted off. Brick veneers fall and expose frames. Environment : Cracking of ground conspicuous. Landsliding general on steep slopes. Liquefaction effects intensified and more widespread, with large lateral spreading and flow sliding adjacent to streams, canals, lakes, etc.
    Tell us your experience and how many seconds the shaking lasted + let us know if your property has been damaged (even slight damage). (max. 500 characters)
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