... the planet, sending up a gigantic plume of gas and debris and blasting outwards a rapidlyexpanding shock wave. As fragment after fragment hammered intothe planet, spectacular images were gathered ... waves, earthquakes, tsunamis, andwildfires. Many urban centres in Europe, Africa, and Asia appear tohave collapsed almost simultaneously around 2350 bc, and recordsabound of flood, fire, quake, ... trepidation. Seismologists predict that a quakeas large as magnitude 7 could strike at any time – directly beneaththe capital. This event, known locally as a chokka-gata quake, willcause severe...