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2017 Valparaiso, Chile earthquake data
In April 2017, a sequence of earthquakes offshore Valparaíso, Chile, raised concerns of a potential megathrust earthquake in the near future. The largest event in the 2017 sequence was a M6.9 on April 24th, seemingly co-located with the last great-sized earthquake in the region—a M8.0 in March 1985. The history of large earthquakes in this region shows significant variation in rupture size and extent, typically highlighted by a juxtaposition of large ruptures interspersed with smaller magnitude sequences. We show that the 2017 sequence ruptured an area between the two main slip patches during the 1985 earthquake, re-rupturing a patch that had previously slipped during the October 1973 M6.5 earthquake sequence. A significant gap in historic ruptures exists directly to the south of the 2017 sequence, with large enough moment deficit to host a great-sized earthquake in the near future, if it is locked.
Complete Metadata
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"fn": "Gavin Hayes",
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| description | In April 2017, a sequence of earthquakes offshore Valparaíso, Chile, raised concerns of a potential megathrust earthquake in the near future. The largest event in the 2017 sequence was a M6.9 on April 24th, seemingly co-located with the last great-sized earthquake in the region—a M8.0 in March 1985. The history of large earthquakes in this region shows significant variation in rupture size and extent, typically highlighted by a juxtaposition of large ruptures interspersed with smaller magnitude sequences. We show that the 2017 sequence ruptured an area between the two main slip patches during the 1985 earthquake, re-rupturing a patch that had previously slipped during the October 1973 M6.5 earthquake sequence. A significant gap in historic ruptures exists directly to the south of the 2017 sequence, with large enough moment deficit to host a great-sized earthquake in the near future, if it is locked. |
| distribution |
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| identifier | http://datainventory.doi.gov/id/dataset/USGS_59a5794ae4b0fa5ae7c7803e |
| keyword |
[
"EHP",
"Earthquake Hazards Program",
"GHSC",
"Geologic Hazards Science Center",
"USGS",
"USGS:59a5794ae4b0fa5ae7c7803e",
"earth science",
"earthquake hazard",
"great-sized earthquake",
"megathrust earthquake"
]
|
| modified | 2020-08-18T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
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| spatial | -71.6623287, -33.0835991, -71.5597684, -33.0178165 |
| theme |
[
"Geospatial"
]
|
| title | 2017 Valparaiso, Chile earthquake data |
