Montana earthquakes list

Last update: April 27, 2012 at 1:44 pm by By

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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 Dillon, Montana Jul 28 12:51 3.6 6 MAP I Felt It INFO
  • Dillon Montana - I was sleeping and the whole king size bed shook violently for about three or four seconds. It woke me and I waited to see if NPR would talk about at 7:15. They did not so I checked your website.
  • Dillon,MT - Loud jolt. Sounded and felt like a brief explosion. Shook house for just a few seconds.
  • Dillon, MT - Just enough shaking to let us know it was an earthquake. No damage and right back to sleep.
  • Butte - Don't know about any damage, but as I lay in bed, I certainly felt the house shake a bit and knew immediately what it was.
  • Dillon,Montana - Morning about 7 ish am ...no damage , but it was good size earthquake Very noticeable
  • Anaconda, MT - Laying on couch sometime between 640 and 0700 and my house made a loud creak along with one slight shake of the couch
  • Butte - Felt it shake the bed briefly
  • Dillon - The quake shook the house very noticeably. We were on second floor of woodframe house built in 1925.
  • Dillon - Felt a very weak shaking but knew what it was. Later in the morning while I was in town, I heard several people who were nearer the quake talk about their windows shaking and a few things moving in their homes.
  • USGS Townsend, Montana Jul 23 23:55 3.5 3 MAP I Felt It INFO
  • Townsend - It felt and sounded more like an explosion than a quake.
  • USGS West Yellowstone, Montana Jun 04 21:22 3.4 9 MAP I Felt It INFO
    USGS West Yellowstone, Montana Jun 04 15:20 2.5 6 MAP I Felt It
    USGS West Yellowstone, Montana Jun 04 12:16 3.5 7 MAP I Felt It INFO
    USGS West Yellowstone, Montana Jun 03 09:52 3.1 7 MAP I Felt It
    USGS West Yellowstone, Montana Jun 03 09:39 2.9 9 MAP I Felt It
    USGS West Yellowstone, Montana Jun 03 09:33 3.4 10 MAP I Felt It INFO
    USGS West Yellowstone, Montana May 31 22:24 3.3 1 MAP I Felt It INFO
    USGS Libby, Montana May 14 02:09 3.4 15 MAP I Felt It INFO
  • Crystal Lake, Montana - It was more of a rolling feeling.
  • USGS Thompson Falls, Montana May 03 15:13 2.5 2 MAP I Felt It
    USGS Thompson Falls, Montana Apr 27 09:44 2.6 6 MAP I Felt It
    EMSC Western Montana Apr 23 14:41 3.5 24 MAP I Felt It INFO
    USGS Lincoln, Montana Apr 23 14:41 3.5 23 MAP I Felt It INFO
  • HELENA - Dishes rattled on our table.
  • USGS Lakeside, Montana Apr 14 20:12 2.9 29 MAP I Felt It
    USGS West Yellowstone, Montana Mar 30 15:12 3.3 6 MAP I Felt It
    USGS West Yellowstone, Montana Mar 30 15:07 3.1 6 MAP I Felt It INFO
    USGS West Yellowstone, Montana Mar 30 13:56 2.5 7 MAP I Felt It
    USGS West Yellowstone, Montana Mar 30 13:30 3.1 4 MAP I Felt It INFO
    EMSC Yellowstone Nat. Park, Montana Mar 30 12:34 4.8 5 MAP I Felt It
    USGS West Yellowstone, Montana Mar 30 12:34 4.8 5 MAP I Felt It
    USGS West Yellowstone, Montana Mar 30 12:34 4.8 6 MAP I Felt It
    USGS West Yellowstone, Montana Mar 30 10:36 3.0 1 MAP I Felt It INFO
    USGS West Yellowstone, Montana Mar 30 06:23 2.8 1 MAP I Felt It
    USGS Three Forks, Montana Mar 28 04:45 2.5 8 MAP I Felt It
    USGS West Yellowstone, Montana Mar 26 23:59 3.5 4 MAP I Felt It INFO
    USGS West Yellowstone, Montana Mar 26 19:14 3.0 6 MAP I Felt It INFO
    USGS Philipsburg, Montana Mar 17 00:49 2.5 4 MAP I Felt It
    USGS West Yellowstone, Montana Mar 01 18:44 2.9 1 MAP I Felt It
    USGS Plentywood, Montana Feb 25 22:45 3.8 5 MAP I Felt It INFO
    GEOFON Montana Feb 25 22:45 4.1 10 MAP I Felt It
    EMSC Eastern Montana Feb 25 22:45 3.8 5 MAP I Felt It INFO
  • Richey - My boyfriend call me at work and said, "Did you feel a tremor? The house just shoot, even the cats noticed it."
  • USGS West Yellowstone, Montana Feb 19 20:34 2.5 8 MAP I Felt It
    USGS West Yellowstone, Montana Feb 15 10:23 3.0 7 MAP I Felt It INFO
    USGS West Yellowstone, Montana Feb 11 23:03 3.5 10 MAP I Felt It INFO
    USGS West Yellowstone, Montana Feb 03 03:01 2.7 7 MAP I Felt It
    USGS West Yellowstone, Montana Jan 06 09:14 3.5 9 MAP I Felt It INFO
  • Hot Springs, MT - I was sitting on the couch and felt a very weak vibration and thought it felt like an earthquake but I talked myself out if it. A few minutes later I was sitting on the end of my bed and felt it again. I thought it felt like an earthquake but disregarded it. Later this evening I was playing on my phone and thought to check to see if any were in my area and there were at the same time I felt the vibrations.
  • USGS West Yellowstone, Montana Jan 06 09:00 2.6 6 MAP I Felt It
    USGS Lincoln, Montana Jan 06 02:05 2.8 25 MAP I Felt It
    USGS Seeley Lake, Montana Dec 24 19:25 2.6 17 MAP I Felt It
    USGS Dillon, Montana Dec 24 07:37 2.8 9 MAP I Felt It
    USGS West Yellowstone, Montana Dec 23 01:39 3.2 1 MAP I Felt It INFO
    USGS Polson, Montana Dec 18 19:57 3.1 8 MAP I Felt It INFO
    USGS West Yellowstone, Montana Nov 25 21:10 3.0 10 MAP I Felt It INFO
    USGS West Yellowstone, Montana Nov 24 07:18 3.1 11 MAP I Felt It INFO
    USGS West Yellowstone, Montana Nov 23 23:03 2.9 11 MAP I Felt It
    USGS West Yellowstone, Montana Nov 23 20:47 3.3 11 MAP I Felt It INFO
    USGS West Yellowstone, Montana Nov 23 20:38 2.6 11 MAP I Felt It
    USGS West Yellowstone, Montana Nov 23 20:23 2.8 11 MAP I Felt It
    USGS Whitehall, Montana Nov 23 14:15 2.7 10 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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