The M6.0 Napa earthquake came along with some interesting effects. It produced relatively large surface ruptures, but only minor secondary earthquake environmental effects like localized lateral spread, almost no liquefaction and rockfalls, but some hydrological changes. Dozens of geoscientists went out for mapping the earthquake ruptures, supported by InSAR data that precisely show where the ground moved.
Now the Geotechnical Extreme Events Reconnaissance (GEER) Association published a 400-pages report on their findings. The report is available for download here. Make sure to read it, it’s full of data and great photographs of surface ruptures.
Other interesting articles and posts on the Napa quake:
- Austin Elliott (The Trembling Earth blog) with amazing images of surface ruptures and background information;
- Austin once again with a blog post on strong ground motions and bridges;
- Some images from the USGS;
- A 3D shake map from the Napa earthquake – made by DougMcCune (@dougmccune), Data from the USGS PGV shake map, processed with self written software package shp2stl (https://github.com/dougmccune/shp2stl), then printed in 3D;
- Mapping building damage from the Napa earthquake with an octocopter: