The Nankai Earthquake has occurred almost concurrently with the nearby Tonankai Earthquake. There is a strong connection between the two seismic events. As a rule, the Nankai Earthquake features both large tremors and a tsunami.
Ang nakaraang Tonankai Lindol at ang Nankai Lindol ay may kaugnayan at sabay na naganap. Ang malaking pagyanig ng Nankai lindol ay may kasunod na malaking tsunami.