Induced seismicity in Basel
The largest event prompted concern from local residents. The six borehole seismometers installed near the Basel injection well to monitor the natural background seismicity and the geothermal stimulation recorded more than 13,500 potential events connected with the geothermal project, from which 3,124 were of sufficient quality to permit [hypocenter] determinations in the period 2–12 December 2006, which spanned the main stimulation and the decline in the event rate. During the post-stimulation period from 13 December 2006 onward, a further 350 locatable events were detected up to 2 May 2007, by which time events were occurring sporadically at around one per day. In all, locations for more than 3,500 events were determined.
AD 17 Lydia earthquake
The AD 17 Lydia earthquake caused the destruction of at least twelve cities in the region of Lydia in the Roman province of Asia in Asia Minor. The earthquake was recorded by the Roman historians Tacitus and Pliny the Elder, and the Greek historians Strabo and Eusebius. Pliny called it "the greatest earthquake in human memory". The city of Sardis, the former capital of the Lydian Empire, was the most affected and never completely recovered from the destruction.