The objective of this report is two-fold. First, to examine whether precursory activity leading to the October 7 attack showed up on the IS stations. Second, to investigate whether these seismograms could have been used to issue warning of preparations for an immediate large-scale attack.  It will be shown that multiple precursory arrivals during the hours leading to the attack locate to sources in the Gaza strip, and that these locations reveal important details on Hamas's attack plans.