International Seismological Centre
On-Line Bulletin

The American Geophysical Union has added the ISC to the list of data centres that can be included in reference lists of AGU journals. The ISC may be cited as both the institutional author of the Bulletin and the source from which the data can be retrieved. A citation should show how the data were retrieved and, if they are from a short time span, the Bulletin issues in which the data were originally published. The format of these references can be seen at http://www.isc.ac.uk/Cite/cite.html

ISS station arrival data for years 1960 to 1963 has been provided by Antonio Villaseñor. (Antonio Villaseñor and E. Robert Engdahl, Systematic Relocation of Early Instrumental Seismicity: Earthquakes in the International Seismological Summary for 1960–1963, Bull. Seism. Soc Am., 97, 1820–1832, 2007)

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Please note
Before 1 Jan 2006 the Jeffreys-Bullen (JB) travel times were used to compute the ISC hypocentres. From 1 Jan 2006 the ISC hypocentres are computed and reviewed using AK135 velocity model. In addition the JB based hypocentres (agency ISCJB) are still computed for continuity purpose until such time when the entire ISC dataset has been recomputed using AK135. The ISCJB solutions are not reviewed by the ISC seismologists.

Data on or after 2008/07/01 has not been reviewed by the ISC

DATA_TYPE EVENT IMS1.0
ISC Comprehensive Bulletin
Event 13439778 North Korea

   Date       Time        Err   RMS Latitude Longitude  Smaj  Smin  Az Depth   Err Ndef Nsta Gap  mdist  Mdist Qual   Author      OrigID
2009/05/25 00:54:40.00               41.2900  129.0700                   0.0              31                          MOS       11473087
2009/05/25 00:54:42.80   0.32 0.810  41.3110  129.0464 9.600 8.800 104   0.0f        72       53   3.61 165.19     uk IDC       12255960
2009/05/25 00:54:43.10        1.700  41.3000  129.0000                   0.0         50      198   1.70  40.30     uk BJI       12471246
2009/05/25 00:54:43.12   0.11 0.650  41.3030  129.0370 3.000 2.700 130   0.0f       131       41   2.79 165.20     kn NEIC      14290060
 (#PRIME)
 (Nuclear explosion.)
 (Underground nuclear explosion.)

Magnitude  Err Nsta Author      OrigID
MB     5.0          MOS       11473087
ML     4.3 0.2    6 IDC       12255960
MS     3.6 0.1   15 IDC       12255960
Ms1    3.6 0.1   15 IDC       12255960
mb     4.5 0.0   45 IDC       12255960
mb1    4.6 0.0   51 IDC       12255960
mb1mx  4.6 0.0   54 IDC       12255960
mbtmp  4.5 0.0   51 IDC       12255960
ms1mx  3.2 0.1   77 IDC       12255960
ML     4.8       11 BJI       12471246
Ms     4.3       26 BJI       12471246
Ms7    4.2       22 BJI       12471246
mB     4.8       16 BJI       12471246
mb     4.6       27 BJI       12471246
mb     4.7       53 NEIC      14290060


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International Seismological Centre
Pipers Lane, Thatcham, Berkshire
United Kingdom RG19 4NS
+44 (0)1635 861022, voice; +44 (0)1635 872351, fax
admin@isc.ac.uk, e-mail