Editing Helike (section)

===Subsequent events===
On 23 August 1817, a similar disaster, an earthquake followed by a [[tsunami]], occurred at the same spot. The earthquake was preceded by a sudden explosion, like that produced by a battery of cannon. The aftershock was said to have lasted a minute and a half, during which the sea rose at the mouth of the [[Selinountas (river)|Selinous]] River and extended to cover all the ground immediately below [[Aigio]] (the ancient Αἴγιον). After its retreat, not a trace was left of some [[Magazine (artillery)|artillery depots]] which had stood on the shore, and the beach was carried away completely. In Aigio, 65 people died and two-thirds of its buildings were entirely ruined, as were five villages in the plain.<ref>The 1817 earthquake at Aigio (then called Vostitza) and its effects are recounted in:
*  {{cite book |last1=Leake |first1=William Martin |title=Travels in the Morea |date=1830 |publisher=John Murray |location=London, England |volume=3 |page=402n |url=https://archive.org/details/moreatravels03leak/page/402}}
*  Reprinted in:  {{cite book |editor1-last=Smith |editor1-first=William |title=Dictionary of Greek and Roman Geography |date=1854 |publisher=Little, Brown & Co. |location=Boston, Massachusetts, USA |volume=1 |pages=[https://archive.org/details/dictionarygreek01smitgoog/page/n1051 1034]–1035 |url=https://archive.org/details/dictionarygreek01smitgoog}}</ref>