Major magnitude 7.8 earthquake - Provincia de San Felipe de Aconcagua, 24 km northeast of Hacienda La Calera, Quillota, Valparaiso, Chile, on Friday, July 9, 1971 at 03:03 (GMT)

Major magnitude 7.8 earthquake - Provincia de San Felipe de Aconcagua, 24 km northeast of Hacienda La Calera, Quillota, Valparaiso, Chile, on Friday, July 9, 1971 at 03:03 (GMT)

Major magnitude 7.8 earthquake at 60 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Jul 9, 1971 03:03:20 UTC
Magnitude: 7.8
Depth: 60.3 km
Epicenter latitude / longitude: 32.601°S / 71.076°W (Provincia de San Felipe de Aconcagua, Valparaiso, Chile)
Antipode: 32.601°N / 108.924°E
Nearest volcano: Tupungato (148 km / 92 mi)
Nearby towns and cities:
22 km (14 mi) SE of La Ligua (Petorca, Valparaíso) (pop: 24,900) --> See nearby quakes!
24 km (15 mi) NNE of Hacienda La Calera (Valparaíso) (pop: 49,100) --> See nearby quakes!
35 km (22 mi) NNE of Quillota (Valparaíso) (pop: 67,800) --> See nearby quakes!
37 km (23 mi) WNW of San Felipe (Valparaíso) (pop: 59,300) --> See nearby quakes!
50 km (31 mi) NNE of Limache (Marga Marga, Valparaíso) (pop: 35,900) --> See nearby quakes!
56 km (35 mi) NNE of Villa Alemana (Valparaíso) (pop: 97,300) --> See nearby quakes!
60 km (37 mi) NE of Quilpué (Valparaíso) (pop: 130,300) --> See nearby quakes!
71 km (44 mi) NE of Valparaiso (Valparaíso) (pop: 282,400) --> See nearby quakes!
103 km (64 mi) NNW of Santiago (Santiago Metropolitan) (pop: 4,837,300) --> See nearby quakes!
122 km (76 mi) NNW of Puente Alto (Santiago Metropolitan) (pop: 510,400) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.2 x 1016 joules (8784 gigawatt hours, equivalent to 7.6 x 106 tons of TNT or 472.4 atomic bombs!) More info
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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.
Mag.DepthLocationSource
7.860 kmValparaiso, ChileUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
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Aftershocks

More info

Recorded aftershocks, latest first (40 quakes)

  • 28 Jun 1973 16:42 UTC
    | M 4.1 |
    62 km (38.5 mi) depth
    |
    140 km (87 mi) distance
    | USGS | Details
  • 24 Jun 1973 16:08 UTC
    | M 3.9 |
    46 km (28.6 mi) depth
    |
    63 km (39 mi) distance
    | USGS | Details
  • 09 Jun 1973 05:12 UTC
    | M 4.1 |
    52 km (32.3 mi) depth
    |
    283 km (176 mi) distance
    | USGS | Details
  • 30 May 1973 17:00 UTC
    | M 4.1 |
    122 km (75.8 mi) depth
    |
    201 km (125 mi) distance
    | USGS | Details
  • 28 May 1973 01:53 UTC
    | M 4.6 |
    5 km (3.1 mi) depth
    |
    226 km (140 mi) distance
    | USGS | Details
  • 25 May 1973 09:45 UTC
    | M 4.3 |
    25 km (15.5 mi) depth
    |
    198 km (123 mi) distance
    | USGS | Details
  • 15 May 1973 07:34 UTC
    | M 4.2 |
    125 km (77.7 mi) depth
    |
    191 km (119 mi) distance
    | USGS | Details
  • 13 May 1973 17:34 UTC
    | M 4.6 |
    77 km (47.8 mi) depth
    |
    48 km (30 mi) distance
    | USGS | Details
  • 08 May 1973 20:28 UTC
    | M 4.6 |
    111 km (69 mi) depth
    |
    255 km (159 mi) distance
    | USGS | Details
  • 06 May 1973 21:12 UTC
    | M 4.6 |
    59 km (36.7 mi) depth
    |
    196 km (122 mi) distance
    | USGS | Details
  • 03 May 1973 16:00 UTC
    | M 4.7 |
    33 km (20.5 mi) depth
    |
    289 km (180 mi) distance
    | USGS | Details
  • 26 Apr 1973 06:54 UTC
    | M 3.9 |
    70 km (43.5 mi) depth
    |
    223 km (139 mi) distance
    | USGS | Details
  • 23 Apr 1973 15:25 UTC
    | M 5.2 |
    85 km (52.8 mi) depth
    |
    157 km (98 mi) distance
    | USGS | Details
  • 22 Apr 1973 14:54 UTC
    | M 4.5 |
    50 km (31.1 mi) depth
    |
    82 km (51 mi) distance
    | USGS | Details
  • 04 Apr 1973 04:14 UTC
    | M 4.1 |
    62 km (38.5 mi) depth
    |
    67 km (42 mi) distance
    | USGS | Details
  • 03 Apr 1973 22:07 UTC
    | M 4.3 |
    196 km (121.8 mi) depth
    |
    225 km (140 mi) distance
    | USGS | Details
  • Show all

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