Moderate mag. 4.1 earthquake - Canton Cañar, 13 km south of La Troncal, Provincia del Cañar, Ecuador, on Friday, 4 Dec 2020 6:55 pm (GMT -5) -
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Moderate magnitude 4.1 earthquake at 4 km depth
5 Dec 00:02 UTC: First to report: IGEPN after 7 minutes.
5 Dec 00:06: Magnitude recalculated from 4.2 to 4.1. Hypocenter depth recalculated from 5.0 to 10.0 km (from 3.1 to 6.2 mi). Epicenter location corrected by 3.1 km (2 mi) towards NE.
5 Dec 01:14: Hypocenter depth recalculated from 10.0 to 4.0 km (from 6.2 to 2.5 mi). Epicenter location corrected by 8.1 km (5 mi) towards ESE.
5 Dec 00:06: Magnitude recalculated from 4.2 to 4.1. Hypocenter depth recalculated from 5.0 to 10.0 km (from 3.1 to 6.2 mi). Epicenter location corrected by 3.1 km (2 mi) towards NE.
5 Dec 01:14: Hypocenter depth recalculated from 10.0 to 4.0 km (from 6.2 to 2.5 mi). Epicenter location corrected by 8.1 km (5 mi) towards ESE.
Update Sat, 5 Dec 2020, 00:03
Light magnitude 4.2 earthquake 18 km southwest of La Troncal, Ecuador4.2 quake Ecuador - Guayas, A 18.26km De La Troncal, 4 Dec 6.55 pm (GMT -5)
The Institute of Geophysics of the National Polytechnic School in Quito (IGEPN) reported a magnitude 4.2 quake in Ecuador near La Troncal, Provincia del Cañar, only 8 minutes ago. The earthquake hit early evening on Friday 4 December 2020 at 6.55 pm local time at a very shallow depth of 5 km. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in La Troncal (pop. 36,400) located 18 km from the epicenter, Naranjal (pop. 32,000) 24 km away, Coronel Marcelino Maridueña (pop. 7,300) 37 km away, and Naranjito (pop. 34,200) 42 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Milagro (pop. 133,500) located 48 km from the epicenter, Yaguachi Nuevo (pop. 27,900) 56 km away, Duran (pop. 167,800) 61 km away, Guayaquil (pop. 1,952,000) 62 km away, and Cuenca (pop. 277,000) 64 km away.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in La Troncal (pop. 36,400) located 18 km from the epicenter, Naranjal (pop. 32,000) 24 km away, Coronel Marcelino Maridueña (pop. 7,300) 37 km away, and Naranjito (pop. 34,200) 42 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Milagro (pop. 133,500) located 48 km from the epicenter, Yaguachi Nuevo (pop. 27,900) 56 km away, Duran (pop. 167,800) 61 km away, Guayaquil (pop. 1,952,000) 62 km away, and Cuenca (pop. 277,000) 64 km away.
Earthquake data:
Date & time: 4 Dec 2020 23:55:35 UTC -
Local time at epicenter: Friday, 4 Dec 2020 6:55 pm (GMT -5)
Magnitude: 4.1
Depth: 4.0 km
Epicenter latitude / longitude: 2.54°S / 79.36°W
(Canton Cañar, Provincia del Cañar, Ecuador)Nearest volcano: Licto (126 km / 78 mi)
Nearby towns and cities:
13 km (8 mi) S of La Troncal (Cañar) (pop: 36,400) --> See nearby quakes!
32 km (20 mi) ENE of Naranjal (Guayas) (pop: 32,000) --> See nearby quakes!
43 km (27 mi) SSE of Naranjito (Guayas) (pop: 34,200) --> See nearby quakes!
52 km (32 mi) SSE of San Francisco de Milagro (Guayas) (pop: 133,500) --> See nearby quakes!
61 km (38 mi) WNW of Azogues (Cañar) (pop: 34,900) --> See nearby quakes!
62 km (38 mi) SE of Yaguachi Nuevo (San Jacinto de Yaguachi, Guayas) (pop: 27,900) --> See nearby quakes!
68 km (42 mi) SE of Duran (Guayas) (pop: 167,800) --> See nearby quakes!
70 km (43 mi) ESE of Guayaquil (Guayas) (pop: 1,952,000) --> See nearby quakes!
84 km (52 mi) SSE of Babahoyo (Los Ríos) (pop: 76,300) --> See nearby quakes!
273 km (170 mi) SSW of San Francisco de Quito (Pichincha) (pop: 1,399,800) --> See nearby quakes!
Weather at epicenter at time of quake:
Moderate Rain
23.9°C (75 F), humidity: 65%, wind: 4 m/s (7 kts) from S
Primary data source: IGEPN (Institute of Geophysics of the National Polytechnic School in Quito)Moderate Rain
23.9°C (75 F), humidity: 65%, wind: 4 m/s (7 kts) from SEstimated released energy: 8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) More info
Data for the same earthquake reported by different agencies
Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
| Magnitude | Depth | Location | Source |
| 4.1 | 4 km | Ecuador - Canar, A 13.08km De La Troncal | IGEPN |
| 4.1 | 10 km | NEAR COAST OF ECUADOR | EMSC |
| 3.4 | 10 km | 10 Km SE of La Troncal, Ecuador | USGS |
User reports for this quake (3)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Cuenca / Very weak shaking (MMI II) / single lateral shake / very short : Felt a quick back and forth shake. Thought it could have been a heavy truck. About a minute later I felt a single shake about the same intensity | One user found this interesting.
Cuenca / Very weak shaking (MMI II) / single vertical bump / very short : Felt like a sharp jolt rather than a sway. The cords for the blinds were swaying back and forth for about a minute afterwards. I'm on the 8th floor of the building.
Cuenca (55.3 km SE of epicenter) [Map] / not felt
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