Central, Harbour line mega block on 18 September, 2011

Mega block on Matunga to Mulund: Fast trains leaving CST between 10.28 am and 3.25 pm will run on slow track from Matunga to Mulund and will halt at all stations in between.

Harbour line trains from Kurla to Vashi will not be operational between 10.21 am to 4.16 pm.
Special trains will run between CST and Kurla as well as between Vashi and Panvel during this time.

There's no mega block between Bandra / Andheri and CST