Moderate earthquake North of Guam, northern Mariana Islands

Last update: August 13, 2014 at 8:29 am by By

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Update : A deep earthquake which is felt in a wide radius exactly because of this depth. Deep earthquakes are however mostly harmless unless they occur at high Magnitudes (M6.5 or more) and below soft soil. Real tsunami waves will seldom occur below M7.0 although local vulnerable areas may get strong currents. Our principle remains : if you feel strong shaking for 20 to 30 seconds : move to higher ground. The earthquake ype of this earthquake is NOT favorable to tsunamis (mainly horizontal movement)

Screen Shot 2014-08-13 at 10.11.57

Screen Shot 2014-08-13 at 10.10.06 38km (24mi) SW of Rota, Northern Mariana Islands
42km (26mi) N of Yigo Village, Guam
45km (28mi) NNE of Dededo Village, Guam
50km (31mi) NNE of Tamuning-Tumon-Harmon Village, Guam
53km (33mi) NNE of Hagatna, Guam

Most important Earthquake Data:

Magnitude : 5.4

Local Time (conversion only below land) : Unknown

GMT/UTC Time : 2014-08-13 00:30:48

Depth (Hypocenter) : 107 km

Depth and Magnitude updates in the list below.

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SRC Location UTC Date/time M D INFO
USGS Rota, Northern Mariana Islands Aug 13 00:30 5.4 101 MAP I Felt It
GEOFON Mariana Islands Aug 13 00:30 5.2 110 MAP I Felt It
  • ordot - I felt something at 10:36am Aug 13th.
  • Yona - No damage
  • Yigo - No damage, just felt shaking
  • Tumon - windows and floor shaking
  • Dededo - Strongest I have felt in awhile... Lasted 30 to 40 seconds... Rattled the typhoon shutters and scared my pit bull...
  • tamuning - no damage at my condo
  • Santa Rita - No damage
  • Dededo - Moderate quick rocking/shaking. Office furniture moved about slightly
  • Yigo - light shaking for 20 seconds
  • Yigo - No damage, scared the animals, started out very light, then shook the house for a few seconds.
  • Dededo - Windows, typhoon shutters and floor shaking..
  • Yiga - No damage.
  • Tamuning - Chandelier was swinging and the rocking chair was going by itself. China cabinet rattled.
  • Tamuning - Floor shaking. Windows Shaking, Small object fell off shelves and a few pictures of walls
  • tumon - Nice rolling sensation for 30 seconds. Lights swinging in conference from.
  • Tamuning - Strong shaking, no damage.
  • Anigua - No damage
  • Yigo - tv, tables, and heavy chairs at my bar were shaking for a good 20-30 seconds….sound of semi passing when it first started. Strongest one I have felt on Guam in the past 2.5 years of being here
  • Dededo - No damage to property. Shaking was loud and noticable.
  • Dededo - Loud rumbling, storm shutters, chandelier,fake plants, doors shook. Felt a little off balance walking during it.
  • Tamining - a little shaking, but was my first earthquake in Guam...I use to leave in Japan... but I'm always scaring
  • Tamuning - Cabinets shaking about 15 seconds
  • Yigo - Everything shaking, dogs going crazy
  • Hagatna - I'm on the 9th floor GCIC Building in Hagatna. No damage but a lot of shaking. The top of the building moved a good 3 feet in both directions. My wife was on the 21st floor of the Westin in Tumon and the shaking scared her enough to exit the building. No damage even for my wife's location.
  • Toto - On the second floor of a school building heard it then felt the shaking and large jolt. Rattled the library shelving after the large jolt....
  • Barrigada - Saw lots of objects moving, and many people felt dizzy afterward. Lasted at least 5 seconds.
  • EMSC Rota Region, N. Mariana Islands Aug 13 00:30 5.4 107 MAP I Felt It INFO
  • Sinajana - Some cracking of walls. Full concrete house. No major damage and No injuries. Hard shaking for about 20 Seconds.
  • Tumon - On phone with the mainland, door to my office closed.thought a heavy cart passing by but the shaking persisted. Lasted about 40seconds.nothing fell.
  • Talofofo - I'm usually a heavy sleeper, but this earthquake was shaking my bed pretty hard, that it actually woke me up.
  • Papago, Saipan - I was reading at the table and felt a rumbling. I went down to the bedroom and asked my husband if he felt it, but he had not.

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    Country where you felt the earthquake
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    Latitude (area) where you felt the earthquake
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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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