A double earthquake struck near Prokopi in Evia on Tuesday, June 23, 2026, according to the revised assessment by Greece’s Geodynamic Institute. The first tremor, measuring 3.6 on the Richter scale, occurred at 10:05 p.m. local time. Its epicenter was located 7 kilometers southwest of Prokopi, at a shallow focal depth of 5 kilometers.
Three minutes later, at 10:08 p.m., a second quake—measuring 3.7 on the Richter scale—struck slightly closer to town: 3 kilometers south-southwest of Prokopi. It shared the same shallow focal depth of 5 kilometers.
A third, smaller tremor—magnitude 2.4—was also recorded at the same location as the first event: 7 kilometers southwest of Prokopi.