Aftershocks of the 2018 magnitude-6.9 earthquake expected to continue
The inferred rupture area (white dashed line) of the May 4, 2018, magnitude-6.9 earthquake, with its foreshocks and first 10 days of aftershocks, spans an area of about 800 sq km (300 sq mi). Circle size indicates earthquake magnitude; color indicates earthquake depth. Magnitudes for some of the larger events are labeled. Inset graph shows the aftershock decay rate for May 4-15, 2018. USGS graphic.