Very strong but deep earthquake below lake Nicaragua

Last update: November 8, 2011 at 7:36 pm by By

Earthquake overview :  At 4:35 PM on November 7, 2011 a very strong earthquake was generated below Lake Nicaragua. Due to the depth of 183 km, the shaking will have been weakened a lot.
“I have Felt it” Reports –> see below + Let us know “how you have felt this earthquake”
To read the full story as it happened, we advise our readers to start at the lower part of the page (earthquake data).

Keep this page open or return regularly as we will be back with more details when they become available

Lake Nicaragua - panoramio image courtesy McLaver

Update : As expected by earthquake-report.com, no damage or injuries have been reported so far by the Dirección General de Bomberos y de la Cruz Roja Nicaragüense

Update : The Instituto Nicaragüense de Estudios Territoriales, Ineter, is reporting a magnitude of 5.8 at a depth of 164 km.

Update : The earthquake was felt as strong by people of Rivas, Moyogalpa, Altagracia and the Island of  Ometepe

Update : Cities with a MMI IV shaking ( K= 1000 people)
Belen 5k, Potosi 5k, Moyogalpa 4k, Buenos Aires    2k, Rivas 30k, San Jorge 7k, Masaya 130k, Tipitapa 127k, Managua 973k

Update : USGS has calculated with their models that nearly 3 million people will have experienced a light MMI IV shaking and 6.4 million people a weak MMI III shaking

Update : Tsunamis cannot be generated in this kind of earthquakes

Update : The depth of the hypocenter will have a weakening effect on the shaking. We expect no more than a weak to light shaking in a vast area of hundreds of km

Update : The earthquake was also felt in the neighboring countries

“I Have Felt It” reports as received by Earthquake-Report.com
Playa Tamarindo : Light shaking and low rumbling noise from the buildings moving.
Esparza :  Costa Rica, all birds stopped noise a few mins before
Heridia, Costa Rica : weak shaking indicated
San Ramon, Costa Rica : In the mountains outside San Ramon, in the province of Alajuela, at 4:36 p.m., moderate shaking. Friends in San Jose immediately posted on Facebook: strong earthquake felt
Costa Rica : Light shaking indicated
Santa Ana, Costa Rica : moderate shaking indicated
Santo Domingo de Heredia de Costa Rica : Felt tremors as a weak shaking
Managua, Nicaragua : Light shaking indicated
Ojochal  : I live in the mountains of Ojochal which is the Southern Pacific part of Costa Rica in the Puntarenas Province.  There were two strong rolling jolts one after the other maybe 3 – 5 seconds delay between them.  I was surprised at the force of the two jolts.  There was not a lot of shaking.

Most important Earthquake Data:
Magnitude : 5.9
UTC Time : Monday, November 07, 2011 at 22:35:27 UTC
Local time at epicenter : Monday, November 07, 2011 at 04:35:27 PM at epicenter
Depth (Hypocenter) : 183.5 km
Geo-location(s) :
22 km (14 miles) N (9°) from Rivas, Nicaragua
37 km (23 miles) SSE (155°) from Granada, Nicaragua
77 km (47 miles) SE of MANAGUA, Nicaragua

Links to important maps
USGS Did You Feel It Map
Google satellite map showing the epicenter and the surrounding area.
Historic earthquakes map
Seismic hazard map
Shaking map
Focal mechanism report
Human impact map

QuakeSOS+ and QuakeSOS free are iPhone applications developed by Armand Vervaeck, the founder of Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is feeding the users with Earthquake Report news. The 0.99 US$ QuakeSOS+ version will support the activities of SOS Earthquakes.

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I did feel it – Ik heb het gevoeld – Το έκανα αισθάνεται –Yo lo he sentido – 我的确感到了 – 私はそれを感じていました- Ich habe es gefühlt – Bunu hissediyorum yaptı – لم أشعر أنه

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People :
Felt by persons at rest, on upper floors or favorably placed.
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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.
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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.
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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.
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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.
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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).
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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.
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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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