Seismic Data

The GeoNet seismic data holdings may be queried, and data retrieved, using AutoDRM (Automatic Data Request Manager).

Broadband Guralp CMG-3ESP seismometer.

Introduction

AutoDRM is an email-based request tool for seismic data collected by the GeoNet project from broadband instruments of the New Zealand National Seismograph Network, the regional networks' (mainly) short-period seismometers and the national strong motion network accelerographs. Request emails are to be addressed to autodrm @ geonet.org.nz. The station codes may be viewed on the network maps, and the site locations and operational dates may be found in DELTA.

Data Formats

The GeoNet AutoDRM supports three data formats for the extraction of waveforms; GSE2.0, SEED, and miniSEED. Data may be requested in these formats by supplying one of the following arguments to the WAVEFORM parameter of the request email: GSE2.0, SEED, MSEED.

GSE2.0

GSE2.0 was developed for use in the GSE's Technical Test 3 (GSETT-3), which was a trial starting on 1 January 1995 of a global system for monitoring nuclear explosions. A description of the GSE2.0 format is available from the Swiss Seismological Service. Various tools for manipulating GSE2.0 files are available from Orfeus.

SEED and MSEED

The Standard for the Exchange of Earthquake Data (SEED) is an international standard format for the exchange of digital seismological data. miniSEED (MSEED) files are data only SEED Volumes. The SEED manual and a description of the miniSEED format are available from IRIS or you can download the full manual (PDF, 8.7 Mb).

Tools for reading SEED volumes, enabling conversion of SEED to SAC (binary or ASCII), AH, SEGY, CSS, miniSEED or fullSEED are also available from IRIS.

UUENCODE

Files created by the GeoNet AutoDRM are uuencoded. Uuencode converts a binary file into an encoded representation that can be sent using electronic mail. The SEED or miniSEED data volume must be extracted from the uuencoded file either using uudecode, or, for Windows users, a suitable archive management tool such as WinZip or PKZIP.

Examples

The following are some example requests to the GeoNet AutoDRM. The examples are in GSE2.0 format but AutoDRM will also respond to messages in GSE format. Before trying the requests you should replace <your email address> with your own email address and <your id> with a message id; this may be up to twenty characters long and is returned in the reply message for tracking purposes.

AutoDRM User Guide

You can request the full User Guide from the AutoDRM with the following request. An online User Guide is also available for browsing, and it is also available in text format. Clicking on each command name below will display more information about the command. Note: not all features covered in the User Guide are implemented by the GeoNet AutoDRM.

Station and Channel Information

Lists stations and their channel information, and the time spans that are available. This may create a long response.

BEGIN GSE2.0
MSG_TYPE REQUEST
MSG_ID <your id> ANY_NDC
EMAIL <your email address>
GUIDE
STOP

Station and Channel Information

Lists stations and their channel information, and the time spans that are available. This may create a long response.

BEGIN GSE2.0
MSG_TYPE REQUEST
MSG_ID <your id> ANY_NDC
EMAIL <your email address>
STA_LIST *
CHAN_LIST *
CHANNEL
STOP

Data Request

Requests SHZ channel data for all stations for the last day of 1986.

BEGIN GSE2.0
MSG_TYPE REQUEST
MSG_ID <your id> ANY_NDC
EMAIL <your email address>
FTP <your email address>
STA_LIST *
CHAN_LIST SHZ
TIME 1986/12/31 00:00:01 TO 1987/01/01 00:00:01
WAVEFORM SEED
STOP