Data Types

Types of Data Available at the DMC

Waveform data		Channel response data
	Passive source		Download dataless SEED volumes
	Active source		Requesting a dataless SEED volume using BREQ_FAST
			Search the database for response information

Event (earthquake) catalogs
	About the catalogs
	Search the catalogs


Waveform data explained
Passive Source Most of the data archived at the DMC is from broad-band stations recording passive (or natural) source events. Some stations record continuously, some have triggered channels. Most of the passive source data are from permanent station installations and are archived in SEED format, but some data come to us from temporary installations and in formats other than SEED.
	Search our data holdings for passive source data
	How to request passive source data
	Data sources
	Information about temporary deployments in SEED format (including PASSCAL experiments)
Active Source Much of the active source data we have here at the DMC is recorded using temporary deployments of instruments provided by the PASSCAL program, but we do have some active source data from other sources. Active source data can come in a variety of formats.
	How to search for active source data
	How to request active source data
	How to request an official ID number for a contributed assembled set
	Data sources
	Information about temporary deployments (including PASSCAL experiments)