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2017 Valparaiso, Chile earthquake data

Dates

Publication Date
Time Period
1985-02-21
Time Period
2017-04-30

Citation

Nealy, J.L., 2017, 2017 Valparaiso, Chile earthquake data: U.S. Geological Survey data release, https://doi.org/10.5066/F71Z439C.

Summary

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 [...]

Contacts

Point of Contact :
Gavin Hayes
Originator :
Jennifer L Nealy
Metadata Contact :
GHSC Data Steward
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Natural Hazards
SDC Data Owner :
Earthquake Hazards Program

Attached Files

Click on title to download individual files attached to this item.

Valparaiso_catalog.txt 8.54 KB
2017_Valparaiso_catalog.csv 4.88 KB
1985_Valparaiso_catalog.csv 2.88 KB
2017_Valparaiso_Chile_data.xml
Original FGDC Metadata

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6.78 KB

Purpose

The dataset is a catalog of relocated earthquakes for the 2017 and 1985 Valparaiso earthquakes. These were used to place the 2017 sequence in the context of other historic events in central Chile, including the 1985 Valparaiso earthquake, and to help determine the potential for future great-sized earthquakes in the region in the near future.

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/F71Z439C

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