At 05:46, January 17, 1995, an earthquake of JMA (Japan Meteorological Agency) Magnitude 7.2 hit middle part of Japan. The epicenter of the earthquake was located south of Hyougo Prefecture in Japan. This earthquake was named as 'The 1995 Hyogo-Ken-Nanbu Earthquake' by the Japan Meteorological Agency. Due to the strong ground motion, many structures and life line facilities were damaged and more than 5,000 lives were lost by the earthquake.
　In order to investigate the cause of damage to the port facilities, this report presents the strong-motion earthquake observation results, attenuation relations of horizontal acceleration and relations between horizontal and vertical acceleration of the earthquake. Strong-motion characteristics of the Hyougo-Ken-Nanbu Earthquake was identified through the comparison with the 1993 Kushiro-Oki Earthquake and the 1994 Sanriku-Haruka-Oki Earthquake.