The California Historical Intensity Mapping Project (CHIMP) is a compilation of seismic intensity observations from moderate to large earthquakes over the past 162 years in California.
Check out the data below, or at GitHub
CHIMP Data
In the Zip file below, there are two folders- the ‘repository’ and the ‘dataset.’
The ‘repository’ contains full felt reports and MMI assignments for earthquakes that were reinterpreted for this study.
Historic earthquakes in the ‘dataset’ are .csv files formatted as LON, LAT, MMI (Modified Mercalli Intensity scale). Did You Feel It? (DYFI) earthquakes in the ‘dataset’ are .txt files in their original format from the USGS.
The ‘dataset’ also contains a file of maximum observed intensities in a 10 x 10-km grid over California.
If you have any questions, contact me at Leah at earth dot northwestern dot edu