Karachi: An earthquake shock is usually powerful enough to shock a large area but a there is hardly any reference or news of a “localized tremor” in history But residents in Karachi's Defence and Clifton areas reported feeling tremors and hearing a loud "boom" Today’s evening.

It is not clear what may have caused the reported sound and tremors, as Edhi and police sources had no information regarding the incident.

TheUS Geological Survey did not indicate seismic activity on its graphs.