Alaska earthquakes list + Alaska earthquakes in-depth articles

Last update: April 27, 2012 at 1:06 pm by By

The list below shows the latest Alaska earthquakes

In depth articles on Alaska earthquakes written by Earthquake-Report.com in 2011  (earlier see below)
- Massive earthquake on the subduction slopes of unpopulated Alaskan Islands (September 2, 2011)
- Massive (scary) Alaskan earthquake in an unpopulated area (June 23, 2011)
- Understanding the Magnitude 7.2 Alaska earthquake (June 23, 2011)
- Moderate earthquake at an intermediate depth triggers a weak shaking in Anchorage, Alaska (June 16, 2011)
- Very strong earthquake close to Sand Point, Alaska, United States (February 2, 2011)

Label info : M = magnitude, D = depth (km), Time = UTC – Alaska time = UTC – 9

SRC Location UTC Date/time M D INFO
USGS Larsen Bay, Alaska Dec 05 12:30 2.8 99 MAP I Felt It
USGS Talkeetna, Alaska Dec 05 08:10 2.8 58 MAP I Felt It
USGS Anchor Point, Alaska Dec 05 01:30 2.6 107 MAP I Felt It
USGS Valdez, Alaska Dec 05 00:37 3.1 10 MAP I Felt It INFO
USGS Adak, Alaska Dec 04 20:21 4.1 33 MAP I Felt It INFO
USGS Redoubt Volcano, Alaska Dec 04 15:04 2.7 132 MAP I Felt It
GEOFON Central Alaska Dec 04 13:15 4.6 17 MAP I Felt It INFO
EMSC Central Alaska Dec 04 13:15 4.8 6 MAP I Felt It INFO
USGS Willow, Alaska Dec 04 13:15 4.6 15 MAP I Felt It INFO
  • Wasilla - Fast fairly light shaking it didn't feel very deep
  • Willow, Alaska - Woke me up. Waited for a big jolt to rock the house but fortunately the shaking did not worsen.
  • Wasilla - Woke up
  • USGS Talkeetna, Alaska Dec 04 13:15 4.4 5 MAP I Felt It INFO
  • Anchorage - I felt one strong "lunge" (sideways motion) that woke me up.
  • Wasilla - It just woke me up.. I could hear items shaking in my room
  • Talkeetna - heard it before I felt it. no damage.
  • USGS Tok, Alaska Dec 03 10:49 2.6 0 MAP I Felt It
    USGS Shemya Island, Alaska Dec 03 09:23 5.6 35 MAP I Felt It INFO
    USGS Shemya Island, Alaska Dec 03 09:23 6.0 26 MAP I Felt It INFO
    USGS Yakutat, Alaska Dec 03 09:08 2.5 0 MAP I Felt It
    USGS Big Lake, Alaska Dec 03 08:04 3.3 14 MAP I Felt It INFO
    USGS Butte, Alaska Dec 03 03:09 2.6 20 MAP I Felt It
    USGS Anchor Point, Alaska Dec 02 22:44 3.0 95 MAP I Felt It INFO
    USGS Cantwell, Alaska Dec 02 21:20 3.0 4 MAP I Felt It INFO
    EMSC Central Alaska Dec 02 21:20 3.0 5 MAP I Felt It INFO
    USGS Chignik Lake, Alaska Dec 02 18:58 2.8 2 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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    Comments

    1. Chandelier was swinging

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