Seismic waves travel through Earth's interior as body waves and surface waves. P-waves are fastest, travel through all materials, causing compression. S-waves are slower, only travel through solids, causing side-to-side motion. Surface waves include Love waves (horizontal) and Rayleigh waves (elliptical)
Strike-slip tectonics involves horizontal crustal movements. Transform boundaries form where plates slide past each other. Fault zones develop as offset segments connected by stepovers
Aftershocks are smaller earthquakes following larger ones in the same area. Large earthquakes can have hundreds to thousands of detectable aftershocks. Aftershocks typically occur up to the rupture length from the fault plane
M=9.1 earthquake occurred along India Plate subduction zone. Rupture occurred on interplate thrust fault near Sunda trench. Rupture moved at 2.5 km/s, reaching 1200 km in 8 minutes
Contains information on faults and folds in US showing ancient earthquake activity. Covers faults from 1.6 million years ago to present. Used in National Seismic Hazard Maps for fault-source characterization
NEIC moved from Boulder to Golden, Colorado in 1974. Located 10 miles west of Denver, Colorado