ABSTRACT: Two different, earthquakes, which caused, severe damage and many casualties occurred in the NW part, of the Erzincan basin and in fte SE part: of the basin on March. 13 (Ms= 6.8) and 15, (Ms= 6.1) 1992, respectively. According, to the official numbers, the magnitude 6.8 Erzincan earthquake .resulted in 653 deaths, 3850 injures, 7013 heavily and 11796 slightly damaged houses. The epicenter of the earthquake of March 13,1992 located between» Yalnızbağ and Günebakan villages located, in the NW part, of the basin. The epicenter of the .another earthquake (Ms= 6.1) located between. Çağlayan and Pülümür in the SE part of the basin where the northern and southern segments of the NAF in that region make a step to the right. Geologic and seismologic data indicate that the earthquake ruptured a 45 km long segment of the NAF to a depth of 29 km. The ruptured section represents the easternmost part of the earthquake of December 26, 1939 (M= 7.9). Relative displacement of the earthquake of March 13 varies, from a few centimeters to 20 cm right lateral and up to 25 cm of throw. We determined 16 km of focal depth for the Pülümür earthquake of March 15. A clear1 surface faulting was. not observed on the ground surface due to` deep focal depth of the earthquake, thick, and unconsolidated sedimentary deposits accumulated in the basin. Surface ruptures developed, as discontinuous, a few hundred meters long and generally secoodary cracks, resulted, from seismic shaking. We observed strike-slip faulting with small reverse component in `the NW` part of the basin. In contrast to, tensional cracks formed in the- SE part of the basin. No crack was. observed, in the southern segment of the NAF extending; from Çağlayan to the eastward. Seismic shaking was locally amplified, Significant, amplification occurred in areas of unconsolidated deposits. coosisting of .alternation, of sand, gravel, and. clay layers,.. Gorund motion obtained from, this earthquake has. been. the stroogerst motion, that recorded so far,, in Turkey. Peak, accelerations were recorded, .as 0.5 g, 0.4 g .and 0.25 g in the directions of E-W, N-S and. vertical, respectively. The maximum, intensity of the Erzincan earthquake shown in the Isoseismic map was assigned as MSK VIII and this, value was compatible with data, of instrumental epicenter. Strong ground motions during the earthquake -triggered many landslides in areas of road cutting, filling grounds » unstable steep slopes and water-saturated grounds. Liquefaction and small-sized sand volcanoes were observed on the both sides of the Fırat River., A total of 6.000- aftershocks were recorded within, three months, after the main shock. The- number of aftershocks gradually decreased with time after the main shock. These aftershocks concentrated in two different places of the basin corresponding to their epiceotral regions of both earthquakes. These aftershocks concentrated in two different laces, of the basin corresponding to` their epiceotral regions of both earthquakes. These afterchocks migrated from the NW` side to the SE side of the basin, along the fault. The- focal depth of afterchocks vary from 5 km to 10 km. Both main shocks lie at the bottom of the aftershocks distribution. In many ways, the Erzincan earthquake of March 13,1992- is very similar to the Loma Prieta earthquake of October 17,1989 (M= 7.1) that ruptured a 40 km long regment of the San Andreas Fault to a depth of 18 km. and amounted to 180 cm horizontal and 120 cm vertical displacements,.,