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.
1833 Kunming earthquake
The 1833 Kunming earthquake was an 8.0 M earthquake that struck the provincial capital Kunming in Yunnan, China on September 6, 1833. The earthquake had its epicenter along the Xiaojiang Fault near the town of Songming, approximately northeast of Kunming's city centre. The earthquake destroyed many buildings, homes, and temples in Kunming and the nearby countryside. More than 6,000 people died as a result of the earthquake and another 80,000 were displaced. The Qing government at the time provided relief to the region and used the event to strengthen its administration in the province. The 1833 Kunming earthquake was the largest magnitude earthquake in Yunnan's recorded history.