TITLE: GCN CIRCULAR NUMBER: 11884 SUBJECT: ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011 DATE: 11/04/05 12:30:16 GMT FROM: Sandip K. Chakrabarti at S.N. Bose Nat. Centre for Basic Sci. ICSP VLF observation of multiple SGR-like bursts from 1E 1841-045 on Feb. 9, 2011 Sushanta K. Mondal (ICSP), Sandip K. Chakrabarti (S. N. Bose Centre and ICSP), Debashis Bhowmick (ICSP) We observed several sudden ionospheric disturbances on Feb. 9th, 2011 in signals transmitted from several stations. One of them (occurring at 05:14:26 UT) coincided exactly with the observed time of Fermi (GCN #11684) but there were many both before and after within a few hundred seconds. All these events were observed in both phase and amplitude, indicating that the disturbances were real. One image of the amplitude/phase from various transmitting stations as obtained by our receiver at Sitapur station is in http://www.bose.res.in/~chakraba/gbm090211.html. The entire set of events were riding on a 'B' type flare, but we suspect our events are not parts of any solar flare, as the time durations of the signals involved appear to be too short (similar to our GRB090424 for our VLF signal; see GCN No.11883) Since GCN #11684 observes only one signal (corresponding to spikes at 18866s in our Figure), we request others to check if there were any observations at the times when other VLF signals were seen.