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Data collection at the ISC

Introduction

The ISC collects phase readings and other earthquake bulletin data from over 130 agencies around the world. The data must be sent to the ISC in electronic form. Data sent by fax or on paper is not accepted. The data collected by the ISC is primarily sent by email to the data-collection address: seismoisc.ac.uk

Emailed data is parsed to the ISC database using the ISC 'capture' program. It uses a suite of recognition routines to examine each email, including sender, 'Subject' lines and also the attached data or attachment filename, in order to recognise that an email comes from a particular agency. The data is then parsed into the ISC database.

Approximately 90% of all received data is parsed automatically.

All data-collection queries/issues should be addressed to John Eve at: seismoisc.ac.uk

Email consistency

To ensure that data is parsed automatically, it is very important that agencies are consistent with their email address, subject lines and any attachment filenames.

It would be appreciated if agencies would give ISC advance notice (to seismo@isc.ac.uk) that email addresses are going to change. A new email address results in the data having to be parsed manually.

Registering of Stations

Only data from stations within the , ISF and Nordic formats.

澳门百乐门网址Where it is not possible to move to a standard format for historical or resource reasons, it is important to be consistent in the format that is sent. This is particularly relevant to formats which use tabs and/or spaces between data-columns. If tabs are used, then spaces should not be used and vice-versa.

澳门百乐门网址When a new bespoke format is created, a detailed description of the format should be sent ahead of the real data, in order for a parser to be written.

Indication of event types

It is very helpful to the ISC and important to the seismological community to know the type of an event, whether it is an Explosion/Mining-related/Earthquake/Volcanic event/etc. The major formats enable the type to be incorporated into the data. Otherwise, this information can be conveyed by Comments.

Data selection

We ask agencies to send all available data, regardless of event magnitude, volume of data, etc. This enables our seismologists to get a fuller picture for each event. Moreover, even if an event does not meet ISC criteria for being reviewed by ISC seismologists, the information is valuable to the seismological community and will be made available in the ISC Bulletin.

Amplitudes/Magnitudes

Amplitudes should be named following the convention in the IASPEI standard seismic phase list澳门百乐门网址 (i.e. A, AML, AMB, AMS)

Amplitudes and magnitudes should be measured following the IASPEI Standard procedures for magnitude determination澳门百乐门网址, and named and reported to the ISC according to IASPEI (Magnitude WG)