This earthquake was located close to the 1939 Chillán earthquake . However , the focal mechanism of the 1953 Concepción earthquake was reverse faulting , while that of the 1939 Chillán earthquake was normal faulting . It was not clear whether the 1953 Concepción earthquake was an interplate or intraplate earthquake
1939 Chillán earthquake
1939 Chillán earthquake
1953 Concepción earthquake