The seismological community is invited to nominate events (including both earthquakes and explosions), for the reference events database, where hypocentre information is known with high confidence (to 10 km or better - GT10). Submitters may be contacted for further confirmation and for arrival-time data. Proper acknowledgement will be given to all submitters.

Note: If you want to submit a large number of events please send an e-mail to gt@isc.ac.uk to negotiate the format before any data exchange takes place.