Montana earthquakes list

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The list below shows the Montana earthquakes

Label info : M = magnitude, D = depth (km), Time = UTC – Montana = UTC – 7

SRC Location UTC Date/time M D INFO
USGS West Yellowstone, Montana Jun 24 07:03 2.5 10 MAP I Felt It
USGS West Yellowstone, Montana Jun 21 22:16 2.9 9 MAP I Felt It
USGS West Yellowstone, Montana Jun 21 21:49 2.5 8 MAP I Felt It
USGS West Yellowstone, Montana Jun 21 17:31 2.7 9 MAP I Felt It
USGS West Yellowstone, Montana Jun 19 03:12 3.0 10 MAP I Felt It
USGS West Yellowstone, Montana Jun 18 07:21 2.7 8 MAP I Felt It
USGS West Yellowstone, Montana Jun 18 01:28 2.7 9 MAP I Felt It
USGS West Yellowstone, Montana Jun 17 00:40 2.5 10 MAP I Felt It
USGS West Yellowstone, Montana Jun 16 22:48 3.0 8 MAP I Felt It INFO
  • Thermopolis, Wyoming - I don't know how long it lasted because the strong shaking woke me up in the early hours of the morning. I was only 9 years old at the time and it was the same earthquake that later became known as the Great Hebgen Lake earthquake of 1959 in the park. Many people were killed from a landslip that occurred at the lake. We were about 100 miles away from the quake and I remember the movement bouncing the bed around and sideways away from its original position. There were a few cracks in the masonry.
  • USGS West Yellowstone, Montana Jun 16 22:39 2.5 8 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 13:55 2.5 10 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 13:17 2.6 10 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 12:40 2.7 7 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 08:02 2.8 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 01:46 2.9 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 01:03 2.8 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 01:03 3.1 9 MAP I Felt It INFO
    USGS West Yellowstone, Montana Jun 16 01:02 2.7 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 00:55 2.7 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 16 00:48 4.4 9 MAP I Felt It INFO
  • west yellowstone - sitting at computer, dogs barking, shake for 7 or eight seconds
  • 5.8 miles West of West Yellowstone Monta - My motor home and contents were shaking for about 20 seconds
  • USGS West Yellowstone, Montana Jun 14 06:15 2.5 11 MAP I Felt It
    USGS West Yellowstone, Montana Jun 14 03:00 2.9 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 13 11:28 2.7 10 MAP I Felt It
    USGS West Yellowstone, Montana Jun 13 07:26 2.7 10 MAP I Felt It
    USGS West Yellowstone, Montana Jun 12 22:54 3.2 10 MAP I Felt It INFO
    USGS West Yellowstone, Montana Jun 12 18:24 2.9 8 MAP I Felt It
    USGS West Yellowstone, Montana Jun 12 18:23 2.8 10 MAP I Felt It
    USGS West Yellowstone, Montana Jun 12 16:48 2.7 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 12 16:46 2.9 10 MAP I Felt It INFO
    USGS West Yellowstone, Montana Jun 02 02:29 2.6 4 MAP I Felt It
    USGS West Yellowstone, Montana Jun 02 02:29 2.6 1 MAP I Felt It
    USGS Polson, Montana May 28 18:37 2.7 3 MAP I Felt It
    EMSC Western Montana May 19 18:42 2.4 9 MAP I Felt It
    EMSC Eastern Montana May 19 07:03 2.7 3 MAP I Felt It
    USGS Lame Deer, Montana May 19 07:03 2.7 2 MAP I Felt It
    USGS Choteau, Montana May 15 05:33 2.5 17 MAP I Felt It
    USGS West Yellowstone, Montana May 07 13:03 2.8 10 MAP I Felt It
    EMSC Western Montana May 06 05:58 2.7 6 MAP I Felt It
    USGS West Yellowstone, Montana May 06 05:58 2.7 6 MAP I Felt It
    EMSC Western Montana May 01 10:37 2.3 14 MAP I Felt It
    EMSC Western Montana Apr 26 22:08 2.2 4 MAP I Felt It
    USGS Lima, Montana Apr 26 02:30 2.6 3 MAP I Felt It
    EMSC Western Montana Apr 18 13:24 2.3 12 MAP I Felt It
    EMSC Western Montana Apr 07 04:51 2.1 4 MAP I Felt It
    EMSC Western Montana Apr 06 09:27 2.1 6 MAP I Felt It
    USGS Three Forks, Montana Apr 06 07:02 3.3 7 MAP I Felt It INFO
    EMSC Western Montana Apr 06 07:02 3.3 8 MAP I Felt It INFO
    EMSC Western Montana Mar 30 20:55 2.5 5 MAP I Felt It
    USGS Virginia City, Montana Mar 30 20:55 2.5 4 MAP I Felt It
    USGS Lincoln, Montana Mar 22 21:12 2.5 14 MAP I Felt It

    Data sources courtesy : USGSEMSCGFZGEONET


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    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.
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