2017 Valparaiso, Chile earthquake data
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.
Resources
| Name |
Format |
Description |
Link |
|
55 |
The metadata original format |
https://data.usgs.gov/datacatalog/metadata/USGS.59a5794ae4b0fa5ae7c7803e.xml |
|
55 |
Landing page for access to the data |
https://doi.org/10.5066/F71Z439C |
Tags
- great-sized-earthquake
- ghsc
- geologic-hazards-science-center
- earthquake-hazard
- megathrust-earthquake
- earthquake-hazards-program
- usgs-59a5794ae4b0fa5ae7c7803e
- ehp
- usgs
- earth-science