Minor earthquake - Morton, Washington on August 23, 2013

Most important Earthquake Data:

Magnitude : 3.6

Local Time (conversion only below land) : 2013-08-23 14:38:35

GMT/UTC Time : 2013-08-23 21:38:35

Depth (Hypocenter)  : 15.7 km

Depth and Magnitude updates in the list below.

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SRC Location UTC Date/time M D INFO
USGS Morton, Washington Aug 23 21:38 3.7 13 MAP I Felt It INFO
  • Longview, WA - Shook the house from one side to the other!
  • Merritt BC - Sitting on my couch and it moved along with a shake and a pop. Felt through out the community, police, fire and ambulance were dispatched due to number of calls but no damage found.
  • Merritt, BC, Canada - Picture window shook hard - felt and sounded like a large bird flew straight into the window. Neighbours up and down the street ran outside wondering what had happened. Nothing like any quake I have felt before.
  • Merritt, BC - Felt the bed/house shake for a few seconds last night. Big enough to make us pay attention, small enough for us to be confused about it!
  • Merritt - the whole house shook, baby and hubby slept right through it!
  • Merritt BC - Friday Aug 23 house shook. Granite Ave.
  • Merritt BC - Felt like a truck had driven into the building. A short hard bang/crash like a tree had fallen on the building
  • Merritt BC - Sounded/felt like someone dropped something heavy in the apartment upstairs.
  • Merritt, British Columbia Canada - Whole house shook for about 5 seconds. Left the ground beneath the house was shaking similar to the vibration of a jack hammer.
  • Merritt BC - Felt and heard rumble for about 3 seconds
  • Merritt British Columbia - It shuck my husbands chair in the den.
  • Merritt, B.C. - Yeah it felt like that a car crashed into my house but when I watched the news this morning I found out it was an earthquake of 3.6, In Washington USA
  • Hockinson - It was very brief (3-5 seconds, maybe) but definitely felt it while I was on the second story of our house. Nothing was shaken out of place.
  • Glenoma - This one surprised me for sure. My computer moved about 2 inches and water was splashing around in my aquarium.
  • The Dalles, OR - I thought thunder had slightly shook the floor of my house. never had before and we were experiencing strong thunder that evening. found out at work on monday others had felt it and there had been a quake that day.
  • Iron Creek campground - Was sitting around the campfire at Iron Creek campground outside of Randle and for a quick second felt my chair lift up then down. Person sitting directly across from me felt it also but not the other 3 sitting around the campfire.
  • Mossyrock Wa. - Noise like a tree hitting the ground, then a sharp jolt rattling the house, over within a second
  • USGS Morton, Washington Aug 23 21:38 3.6 15 MAP I Felt It INFO
  • Cougar, WA - Everything rattled, though nothing was moved out of its place or fell.
  • Battle Ground - I could hear the house creak slightly and some dishes on the table rattled.
  • randle - house shook
  • Longview wa - sudden jolt, shook my small house...over within a split second. Sure upset my Lab dog.
  • Randle - Barely felt the house shake
  • Merritt BC Canada - Windows and doors shook for about four seconds
  • Tacoma - I was at the NW Quilt Show in the Tacoma Convention Center. My friend and I decided to take a break and found some chairs positioned near the windows on the third floor of the building. As we sat there and visited, I felt a movement of the building, a shaking that was very gentle (not at all like the other earthquakes I have experienced. I mentioned it to the ladies at my table and only two of us out of eight felt the shaking. Then it was gone.
  • Merritt BC - Vibration started underneath me, it was like sitting on a vibrating road packer. The shake seemed to be more up and down thanside-ways vibrating. It shook the heavy sofa I was sitting on. Our picture window shook hard. Not completely sure but the SHAKE seemed to effect the front part of our house, moreso than than the back side of our home.
  • couger - went through quick, slight rumble then gone.


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    I felt the shaking *
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    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) ?
    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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