The United States Geological Survey reported a magnitude 7.8 earthquake in Gaziantep near Nurdağı, Turkey at 4:17 am local time. A second, equally as powerful earthquake struck shortly after. Dozens of shocks have left the regions of Turkey, and Syria, in ruins.
According to USGS, the second earthquake was a magnitude of 7.5 which struck southeastern Turkey about nine hours after the initial quake earlier this morning. The quakes were so powerful that they were felt as far south as Aleppo, Syria.
Buildings and homes have been destroyed as this corner of the world is still recovering from missile strikes, being ravished by war, and economic collapse. The region is officially facing a humanitarian crisis. More than 2300 people have been pronounced dead, and the death toll is expected to rise as clean-up efforts continue and aftershock quakes subside.
USGS explains the series of earthquakes as follows:
“On February 6, 2023, a magnitude 7.8 earthquake occurred in southern Turkey near the northern border of Syria. The earthquake was followed 11 minutes later by a magnitude 6.7 aftershock. The magnitude 7.8 earthquake resulted from strike-slip faulting at shallow depth. The event ruptured either a near-vertical left-lateral fault striking northeast-southwest, or a right-lateral fault striking southeast-northwest. The preliminary location of the earthquake places it within the vicinity of a triple-junction between the Anatolia, Arabia, and Africa plates. The mechanism and location of the earthquake are consistent with the earthquake having occurred on either the East Anatolia fault zone or the Dead Sea transform fault zone. The East Anatolia fault accommodates the westward extrusion of Turkey into the Aegean Sea, while the Dead Sea Transform accommodates the northward motion of the Arabia peninsula relative to the Africa and Eurasia plates.
Although earthquakes are commonly plotted as single points on a map, they rupture planes that have dimensions. A magnitude 7.8 strike slip earthquake typically ruptures a fault ~190 km long and ~25 km wide.
The region where the February 6 earthquake occurred is seismically active. Only three earthquakes of magnitude 6 or larger have occurred within 250 km of the February 6 earthquake since 1970. The largest of these, a magnitude 6.7, occurred northeast of the February 6 earthquake on January 24, 2020. All of these earthquakes occurred along or in the vicinity of the East Anatolia fault. Despite the relative seismic quiescence of the epicentral area of the February 6, southern Turkey and northern Syria have experienced significant and damaging earthquakes in the past. Aleppo, in Syria, was devastated several times historically by large earthquakes, though the precise locations and magnitudes of these earthquakes can only be estimated. Aleppo was struck by an estimated magnitude 7.1 earthquake in 1138 and an estimated magnitude 7.0 earthquake in 1822. Fatality estimates of the 1822 earthquake were 20,000-60,000.”
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