Dangerous shallow earthquake on the coast of Ecuador (greater Manta region) - June 30, 2017

Report with the collaboration of Carlos Robles who is following local news media
Are you one of the people who felt the shaking of this earthquake. If Yes, please let us know what you experienced by filling up the I FELT IT form at the bottom of this page. Thank you for your cooperation.
Traducción al español (automático Google) a través de este enlace

Update 15:31 UTC: Unless something unexpected happens we will finalize this report with the great poster of geologist Jay Patton. A better synopsis of what exactly happened can hardly be found anywhere else. If you want to consult other Jay Patton reports of important earthquakes, click on the picture to be redirected.

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Update 09:49 UTC: Ecuador's seismological agency says that this earthquake is in fact an aftershock from the M7.8 April 16, 2016 deadly Esmeraldas earthquake. Since April 16, 2016 Ecuador's seismological agency recorded 3741 aftershocks, most of them not felt by humans.

Update 23:57 UTC: 1 house has collapsed under the shaking. Local newspapers are reporting 1 injured person and minor damage in many areas. Minor damage means broken tiles, plaster falling from the walls etc,

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Update 23:56 UTC: Professor Max Wyss, who specializes in theoretical prognoses of injuries and fatalities expects : 0 to 20 fatalities and 0 to 100 injuries.

Update 23:36 UTC: Tectonically this is a subduction earthquake very close to the trench were the Nazca oceanic plate (red on the map below) subducts the South American plate at approx. 50 mm/year. In many places the plates are locked and the stress builds up until an earthquake frees the energy.

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Update 23:29 UTC: Some slight injuries are being reported from the greater epicenter area but we consider most of them as secondary effects.

Update 23:25 UTC: Focal mechanism of the earthquake. We expect the main movement to be upward (fault plane 2 in the drawing).
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Main earth movement based on the current focal mechanism. Image courtesy Observatoire Geoscope

 

Update 23:16 UTC: No signs of any damage as yet. A lot of panic in Bahia de Caraquez, cars going fast getting out of the coasts as they feared for a (non-existent) tsunami. People tend to auto-evacuate after strong shaking and that's simply the best attitude.

Update 23:11 UTC: And yet another damage and shaking estimate from CatNews/RiskLayer/Cedim

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Update 23:07 UTC: Another estimate with shaking values as reported by JRC

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Update 23:05 UTC: This earthquake will normally NOT generate Tsunami waves as the Magnitude is not powerful enough (besides a couple of exceptions, the Magnitude needs to be at least M7 of higher)

Update 23:03 UTC: Affected towns and villages and their distance to the epicenter. The chance on damage is rather limited BUT ONLY because of the sparsely populated coastal stretch

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Update 22:57 UTC: According to the USGS approx. 1000 people may have sustained a very strong (potentially damaging) shaking

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Update 22:54 UTC: Theoretical shaking map from USGS. USGS estimates that only a small area on the coastline will experience stronger shaking

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Update 22:52 UTC: epicenter map from USGS

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Update 22:44 UTC: Seismogram as recorded at a station in Quito

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Update 22:43 UTC: Based on the present earthquake parameters (Magnitude, Depth, Population, etc) and our experience with earthquake damage impact, earthquake-report.com calls this earthquake extremely dangerous and expects injuries and serious damage

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Map courtesy Alomax.free.net - 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

 

Bahía de Caráquez, Ecuador, 30.7 km (19.1 mi) Population: 37,056
Tosagua, Ecuador, 58.6 km (36.4 mi) Population: 14,680
Chone, Ecuador, 61.2 km (38.0 mi) Population: 44,751
Rocafuerte, Ecuador, 65.6 km (40.8 mi) Population: 10,274
Portoviejo, Ecuador, 80.0 km (49.7 mi) Population: 170,326

Most important Earthquake Data:

Magnitude : 5.9

Local Time (conversion only below land) : 2017-06-30 17:29:45

GMT/UTC Time : 2017-06-30 22:29:45

Depth (Hypocenter) : 10 km

Depth and Magnitude updates in the list below.

Donation - long - San Francisco

Share your earthquake experience (I Have Felt It) with our readers.
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
EMSC Near Coast Of Ecuador Jun 30 22:37 4.9 8 MAP
  • Cuenca - Light shaking at Cuenca
  • Las tunas - The shaking seemed to last 3-5 seconds. It was weak but noticeable enough that I thought there had been an earthquake.
  • Near Olon - Felt stomach quiver, then chairs we were sitting in gently shook. Hanging lights swayed slightly. Lasted approx. 15 sec. Was in Bahia April 16, 2016 and felt 7.8
  • Bahia de Caraquez - 20 to 30 seconds, shaking with a slight break and more shaking. No damage.
  • GEOFON Near Coast Of Ecuador Jun 30 22:29 5.9 10 MAP I Felt It INFO
  • Samborondon - Algo fuerte pero corta duración. (via emsc)
  • Tabuga - Moderate shaking here
  • Cuenca - 8 seconds of mild shaking on the 6th floor of our apartment. Cuenca (via emsc)
  • jama - Cars were shaking/rolling slightly, power posts moving, buildings moving... it lasted maybe 30 seconds? seems like longer. ptsd returned to some people... at 5:38 slight movement for about ten or fifteen seconds with a brief pause between start and finish.. subtle...
  • Crucita - lying in bed felt three distinct side-to-side shakes ( north to south ), 5-10 second duration each
  • USGS Near The Coast Of Ecuador Jun 30 22:29 6.0 5 MAP
  • Canoa - 8 to 10 seconds of shaking. A lot of noise from 4 month old home. No damage, or fallen pictures, or loss of electricity.
  • Olon - My house is elevated and started to sway back and forth. Chandelier started to sway back and forth. Shutters slightly opened and closed. It lasted around 30 seconds. No damage.
  • Montañita - I am in hotel kundalini in Montañita. I was laying in bed when I felt it. My girl who was taking a shower did not. Lasted only a few seconds. Felt like someone was rocking my bed side to side. Did not know what it was until today. She Thought I was going crazy. No damage to anything
  • Cotacachi - No damage. The chandelier in our house was swaying. It was a brief shaking, my husband was seated and he felt it. I was standing and I didn't feel it.
  • EMSC Near Coast Of Ecuador Jun 30 13:22 4.1 6 MAP I Felt It INFO


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    City/Village where you felt the earthquake *
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    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) ?
    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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