KARACHI/QUETTA: Karachi has experienced unusual seismic activity since June 1, with 36 minor earthquakes recorded so far due to the activation of the Landhi fault line, the Pakistan Meteorological Department (PMD) said on Thursday.The most recent tremor, with a magnitude of 2.6 and a depth of 10 kilometres, struck today at 1:45am, with its epicentre located 8km southeast of Malir.   The...