A magnitude 4.2 (Mw) earthquake hit Sikkim on the aniversary of the 6.9 magnitude earthquake, which occured last year in the Sikkim Himalaya.
The transverse component broadband record from the IISER Kolkata seismological observatory and the S-wave spectra of the event is plotted below.
The Origin time and location is taken from IMD. The source parametrers (M0, Mw, circular fault radius and stress drop) have been computed from the S-wave spectra and is given in the plot below.
Compiled by Supriyo Mitra