Strong earthquake in Michoacan, Mexico generates slight damage

Last update: April 22, 2013 at 8:30 am by By

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Update 07:37 UTC : A lot of contradiction in seismic data again during this earthquake.
- SSN had adapted the depth of the hypocenter from 74 to 10 km !
- EMSC still has a depth of 70 km
- Geofon and USGS 28 km.
The real depth would be probably in between 10 and 28 km as some houses have cracks. Deeper earthquakes do rarely generate cracks at this Magnitude.
- 28000 people will have (theoretically) experienced a MMI VI strong shaking.

Update 2:09: Seismic alarms weren’t triggered this is because of the depth of the hypocenter (74km), most of the times the alarms are triggered by shallow earthquakes.
- A wall collapsed in the department of Moctezuma.

Update 2:06: Cracked walls have been reported and confirmed by the authorities in the department of Guacamayas, Lazaro Cardenas in the state of Michoacan.

Update 2:01: No major damage has been reported (we don’t expect a lot of damage from this earthquake, only cracked walls, broken windows, etc.).
-Still there is no power in some zones around Mexico City.

Update 1:52: USGS expects at least 214,000 people feeling a Moderate shaking (V on mercalli scale), and more than 6 million people feeling a Weak to Light shaking (II to IV on the mercalli scale).

Update 1:44 UTC– The SSN (Mexican Seismological Agency) has downgraded the magnitude from 6.2 to 5.8, while the USGS is giving a magnitude of 5.9 at a depth of 74km. Both values are not dangerous and only making the earthquake widely felt because of the depth.

Update 1:35:  The Mexican Seismological Agency is giving a preliminary magnitude of 6.2.
-Was clearly felt in Mexico city and barely noticeable in Acapulco, Jalisco.
-Live images are showing areas without power, we don’t know at the moment where are the blackouts.
-Damage hasn’t been reported and all services are working fine. We at E-R are expecting minor to no damage from this earthquake.

intensity

21km (13mi) NE of Las Guacamayas, Mexico
25km (16mi) NNE of Lazaro Cardenas, Mexico
25km (16mi) NE of La Orilla, Mexico
61km (38mi) SSE of La Mira Tumbiscatio, Mexico
341km (212mi) WSW of Mexico City, Mexico

Most important Earthquake Data:

Magnitude : 6.1

Local Time (conversion only below land) : 2013-04-21 20:16:36

GMT/UTC Time : 2013-04-22 01:16:36

Depth (Hypocenter)  : 70 km

Depth and Magnitude updates in the list below.

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Click on the “I Felt It” button behind the corresponding earthquake. Your earthquake experience is not only important for science, but also for people in the area as well as our global readership.

SRC Location UTC Date/time M D INFO
USGS Michoacan, Mexico Apr 22 01:16 5.9 28 MAP I Felt It
EMSC Michoacan, Mexico Apr 22 01:16 6.1 70 MAP I Felt It INFO
GEOFON Michoacan, Mexico Apr 22 01:16 6.1 29 MAP I Felt It
  • Mexico City - Heard light creaking of the walls in a quiet room. My dad didn´t feel anything in the adjacent room with the tv on. My mom felt her bed move slightly.
  • Metepec, Edo. Mexico, Mexico - Aprox. 8:18 p.m. definite movement leaves on plants shaking up & down about 4 inches.
  • Morelia, michoacan - a fast strong shaking after that all more light
  • Manzanillo - I thought one of my cats was behind an appliance until there was a weak shaking. No big deal.
  • Mexico DF - Southern area of Mexico City, moderate to strong shaking, pictures on walls crooked, mild rattling of windows in my living room
  • guadalajara - hotel Howard johnson piso 9
  • Mexico City, Mexico - Rattled my bed, bottled water fell off the rack. Mexico City.
  • Toluca - Writing a report and I immediately knew something was wrong. On the 7th floor at Holiday Inn Toluca Airport. About 15 people ran outside.
  • Mexico City, western suburb/hills - It was very brief, but surprisingly 'shifting' underfoot. Curtains rattled for more than a minute, but it was really only one short 'shove.'
  • mexico city - i felt the bed shake, then i put my hand on the wall, and realized it was an earthquake.
  • Mexico, D. F., Colonia Condesa - thought iam drunk.. until all people ran into the streets :D
  • patzcuaro, michoacan - actually didn`t feel the first one but felt a much stronger `aftershock` but have seen nothing reported ...
  • Mexico City - Felt chair shaking for a few seconds.
  • Mexico City - Just before 11:00pm and working on my laptop i a hotel. Chair shook for about 4 to 5 seconds.
  • Mexico City - 9eme etage hotel galerias plaza reforma, tremblements moderes du sol, legers bruits de craquements de la structure. Environ une quinzaine de secondes.

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    SHARE YOUR EARTHQUAKE EXPERIENCE WITH US

    Enter Email (not compulsory)
    Country where you felt the earthquake
    City/Village where you felt the earthquake
    Street or suburb (area) where you felt the earthquake
    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.
    Write your experience below + let us know if your property has been damaged (even slight damage) or if you have knowledge of any damage caused by this earthquake. (max. 500 characters)

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