Strong earthquake at intermediate depth below Nicoya, Costa Rica - September 1, 2017

Update 09:09 UTC: This is a typical subduction earthquake.
An earthquake at intermediate depth (hypocenter or breaking point in between 40 and 80 km) is one of the most widely felt earthquake types. The earthquake type is mostly subduction related (2 tectonic plates gliding over each other). Unless they happen below land and unless they have a Magnitude of 6.0 or more, they are rarely inflicting damage. calls them the perfect earthquake preparedness exercises as many people will feel them and get a wake-up call.

Update 09:00 UTC: Based on the present earthquake parameters (Magnitude, Depth, Population, etc) and our experience with earthquake damage impact, does not expect any serious damage from this earthquake as the hypocenter is at an intermediate depth

Update 08:59 UTC: Seismogram as recorded in a seismological station in Juntas, Costa Rica

Screen Shot 2017-09-01 at 09.58.27

Screen Shot 2017-09-01 at 09.58.11

Map courtesy - Star: calculated epicenter - Small red dots: possible error margin for the epicenter, the more dense, the higher probability that the epicenter will be in that area. Orange circle: epicenter location error zone


Most important Earthquake Data:

Magnitude : 5.3

Local Time (conversion only below land) : 2017-09-01 01:42:47

GMT/UTC Time : 2017-09-01 07:42:47

Depth (Hypocenter) : 27 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 Costa Rica Sep 01 07:42 5.3 27 MAP I Felt It INFO
  • Huacas, Guanacaste - The property is fine, it lasted around 4 to 5 seconds and gradually got stronger from beginning to end.
  • Playa Garza - 15 seconds. no damage
  • Montezuma - Weak shaking
  • Brasilito - The shaking lasted a few seconds, it became gradually stronger from start to finish
  • Tamarindo - Woke us and the neighbors up, & seemed like 5 seconds of shaking.
  • Playa Flamingo - No damage shaking lasted 5 seconds...enough movement to cause concern
  • Cañas - Duro unos 3 segundos me despertó, el abanico de piso se movía y por poco cae, se sintió bastante
  • El Carmen de Guadalupe - Light shaking
  • Playa Grande - We were woken up by a light shaking but became almost moderate, then it died off. Lasted about 4 seconds long. All is well.
  • Mal pais - No property damage, but shaking lasted about 5 seconds and was strong enough to wake us from our sleep.
  • Guanacaste - Cabinet was shaking
  • Jaco - Sitting in living room of beach condo watching TV. It Started weak and grew. When I stood up I almost lost balance because of the strength of the shaking/rolling. It seemed like a long time. 30 seconds or more
  • Playa Peladas de Nosara - No damage, no breakage in home in Playa Peladas or in restaurant in Playa Guiones. Reports from employees in village of Nosara about 2 k north-east of dishes sliding off shelves and TVs falling.
  • Playa Langosta - 3 - 4 seconds. No damage, but shaking/rattling. Animals outside were unsettled.
  • Santa teresa - Lasted about 5 seconds. Glass doors rattled and house shaked as well. Woke me up from sleep.
  • Playa Santa Teresa - Je suis en vacances au Costa Rica. Secousse qui m a réveillé vers 1h45. Dans un premier temps je n ai pas pensé à un tremblement de terre et me suis rendormi.
  • nosara - lasted 5 seconds.
  • La garita nueve guanacaste - My bed started to shake and then the bars on my window were violently shaking as if someone had a hold of them trying to break in. I found out today it was the earthquake in nicoya.
  • USGS Nicoya, Costa Rica Sep 01 07:42 5.3 19 MAP
  • Samara - No damage lasted about 4 or 5 seconds
  • Samara - Lasted about 5 sec, no damage found. Severe enough to head for the door
  • Aguacate - Moderate shaking
  • Escazu - Light shaking
  • Canas - Bastante fuerte aproximadamente unos 3 segundos, por poco cae mi abanico de piso.
  • Playa Guiones - Lasted about 3 seconds. The ground is soft close to the beach where we are located. Outside potted plants turned over, branches fell, car alarm went off.
  • Samara - Only lasted about 5 seconds but was strong enough to be concerned. No damage found.
  • Nosara - We were awakened by a shake so strong I thought it could have thrown me out of bed. Must have been at the end of the longer shake others felt -- no more than 2 seconds for us. Slight wall damage in our condo near Playa Pelada. None at our BV home.




    Other earthquakes in the greater epicenter area

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

    Screen Shot 2018-02-12 at 18.31.30

    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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