Very strong but very deep earthquake below southern Bolivia - April 2, 2018

Damage report in cooperation with the 2018 Earthquake Impact Database

Update April 5, 23:04 UTC: 1 house was damaged due to this earthquake

Update 14:17 UTC: USGS shaking map but as our readers can notice, the earthquake was felt in a far wider radius!

Update 14:11 UTC: The origin of this earthquake is the stress of the convergent boundary where the heavier Pacific ocean oceanic plate is subducting the South American plate.

Update 14:09 UTC: The earthquake was felt in a very wide radius as wet reports from the Brazil coastal areas

Update 14:06 UTC: Characteristics of very deep earthquakes
Deep-focus earthquakes give rise to minimal surface waves. Their focal depth causes the earthquakes to be less likely to produce seismic wave motion with energy concentrated at the surface. The path of deep-focus earthquake seismic waves from focus to recording station goes through the heterogeneous upper mantle and highly variable crust only once.
Therefore, the body waves undergo less attenuation and reverberation than seismic waves from shallow earthquakes, resulting in sharp body wave peaks.
Subduction gives us a way around this. As the lithospheric plates making up Earth's outer shell interact, some are plunged downward into the underlying mantle. As they exit the plate-tectonic game they get a new name: slabs. At first the slabs, rubbing against the overlying plate and bending under the stress, produce shallow-type subduction earthquakes. These are well explained. But as a slab goes deeper than 70 km, the shocks continue.
Interested in this subject, just click on this link and read all about it.

Update 13:56 UTC: Seismogram as recorded in a seismological station in Chile

Update 13:54 UTC: Based on the people joining us in the Apps and Website, the earthquake was felt in Brazil too (normal by the way)

Update 13:48 UTC: Breaking point of this earthquake is in the hot solid sphere of the earth

Update 13:48 UTC: Very unsure about the outcome as all numbers are still preliminary

Update 13:47 UTC: Based on the present earthquake parameters (Magnitude, Depth, Population, etc) and our experience with earthquake damage impact, does not expect any damage from this earthquake

Carandayti, Bolivia, 10.6 km (6.6 mi) Population: 0
Villamontes, Bolivia, 81.1 km (50.4 mi) Population: 18,761
Camiri, Bolivia, 87.1 km (54.1 mi) Population: 27,961
Yacuiba, Bolivia, 164.5 km (102.2 mi) Population: 82,803
Tarija, Bolivia, 202.4 km (125.8 mi) Population: 159,269

Most important Earthquake Data:

Magnitude : 6.8

Local Time (conversion only below land) : 2018-04-02 09:40:34

GMT/UTC Time : 2018-04-02 13:40:34

Depth (Hypocenter) : 538 km

Depth and Magnitude updates in the list below.

Donation - long - San Francisco

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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.

Refresh this list
SRC Location UTC Date/time M D INFO
GEOFON Southern Bolivia Apr 02 22:50 4.2 580 MAP
EMSC Chuquisaca, Bolivia Apr 02 22:50 4.1 580 MAP I Felt It INFO
USGS Carandayti, Bolivia Apr 02 15:00 4.5 562 MAP
EMSC Chuquisaca, Bolivia Apr 02 15:00 4.6 560 MAP
GEOFON Southern Bolivia Apr 02 15:00 4.7 562 MAP I Felt It INFO
  • Springfield, IL - About 3 seconds
  • USGS Carandayti, Bolivia Apr 02 13:40 6.8 562 MAP
    GEOFON Southern Bolivia Apr 02 13:40 6.8 538 MAP I Felt It INFO
  • Campo Mourão - Light shaking - - ER: Thank you for telling us
  • Balneario Camboriu - SC - Very weak shaking
  • São Paulo - Light seasickness
  • Santos-SP - Hoje por volta das 10:49 AM estava.sentada em casa quando o prédio onde moro começou a balançar muito forte, vários moradores também sentiram. Não sei exatamente o que foi e de onde veio, mas deu medo.
  • São Paulo - Very weak shaking
  • Asa Norte - Péssima !! Pensei que estava desmaiando e gritei o meu marido.
  • Sao Paulo - durou uns 15 segundos..
  • sao paulo - Weak shaking
  • Brasilia - 5 seconds, no damage.
  • Brasília - Weak shaking
  • São Paulo - I felt dizzy, as if my body swung in the chair, It lasted five seconds. No dammages at all.
  • São Paulo - Predios na Av.Paulista foram esvaziados por umas 3 horas, vi a noticia nos jornais pela TV. Sandra Carvalho.
  • Maringá - Shake for 5 seconds
  • São Paulo - O prédio da empresa Atento balancou de um lado para o outro. Senti como se estivesse c tontura
  • Brasilia - 5 seconds
  • São Paulo - We evacuated the building because this is something we didn\'t expect in São Paulo, we felt the building shaking at the 10th and 9th floors. - ER: WOW + i can understand of course 🙂
  • Pocos de Caldas - eu senti um tremor hoje mais cedo, mas nao sei se foi o caminhao que tava passando na rua

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    Other earthquakes in the greater epicenter area

    Strongest earthquakes (since 1900) within a 150 km radius from this earthquake


    I felt the shaking *
    Country where you felt the earthquake *
    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.
    Tell us your experience and how many seconds the shaking lasted + let us know if your property has been damaged (even slight damage). (max. 500 characters)
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