There is a complex interaction 
between earthquakes and 
volcanic eruptions. Currently, 
swarms of small earthquakes can 
be used to predict the possibility 
of a major eruption. In general,
earthquake prediction is very 
difficult. Good news here - no 
volcanic threats in Israel. The 
various Syrian volcanos - Jabal ad 
Druze, Es Safa and the Mt. Avital 
complex in the Golan Heights - do 
not currently pose a danger.  The 
Aegean Arc island of Santorini 
had a massive  explosion in 1638 
BC and has been active. Some of 
the earliest regional art and 
pottery depicts eruptions of 
Hasan Dagi. For the moment, 
we'll assume nothing like Toba, 
Tomba or Krakatoa will impact 
Israel in the immediate future.
There are no appreciable tides at 
the ports of Haifa or Eilat.     
      
      
       We note that Jabal al Tair at the southern end of the Red Sea had been dormant 
for over 120 years. After several weeks of many minor earthquakes, it erupted 
in December 2007 (and is still active) killing six Yemeni sailors and forcing the 
evacuation of dozens more. By a  miracle, NATO warships rescued two sailors 
who had been drifting in the shark-infested waters for 20 hours.