Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 11883

Comparison of ICSP VLF observation of GRB 090424 with satellite observations
2011-04-05T11:09:52Z (13 years ago)
Sandip K. Chakrabarti at S.N. Bose Nat. Centre for Basic Sci. <>
Sushanta K. Mondal (ICSP), Sandip K. Chakrabarti (S. N. Bose Centre and ICSP),
Asit Choudhury (ICSP, Malda branch), Achintya Chatterjee (ICSP, Malda Branch),
and D. Bhowmick (ICSP)

Indian Centre for Space Physics observed the ionospheric perturbation
due to GRB 090424 (GCN No. 9316) through monitoring VLF signals from various
The final analysis with corrected time stamp
( suggests
that VLF signals were spreaded out for few seconds due to ionospheric effects.
Looking for U.S. government information and services? Visit