Rapid Emergency Products from Strong Motion Observations of the M 7.5 Earthquake Offshore Eastern Honshu，Japan

At 22:15 Beijing Time on December 8, an earthquake with a magnitude of 7.5 occurred offshore eastern Honshu, Japan. Following the event, the Strong Motion Observation Center of the Institute of Engineering Mechanics, China Earthquake Administration, promptly initiated a rapid emergency response. Personnel were mobilized to collect, process, and conduct preliminary analysis of the strong motion records from this earthquake. Emergency products, including maps of Instrumental Seismic Intensity and Peak Ground Acceleration (PGA) distribution, were rapidly generated. These products provide immediate scientific support for disaster assessment and emergency decision-making in the affected country, China's cross-border disaster relief efforts, and infrastructure risk evaluation.