Useful websites for seismologists:

The web’s largest map gallery:
http://maphill.com

Leaflet library for interactive maps:
https://leafletjs.com

German Research Center for Geosciences (GFZ):
https://geofon.gfz-potsdam.de/contact/

The International Seismological Centre (ISC):
http://isc.ac.uk

Automatic Disaster Analysis & Mapping (ADAM):
https://geonode.wfp.org/adam.html

The Generic Mapping Tools (GMT):
https://generic-mapping-tools.org

Data at (IRIS):
http://ds.iris.edu/ds/nodes/dmc/data/

NetQuakes Data:
https://earthquake.usgs.gov/monitoring/netquakes/viewdata

Earthquakes from (USGS):
https://usgs.gov/programs/earthquake-hazards/earthquakes