Infrasound data recorded at Chichijima of Ogasawara Islands, Japan. The data include signals from the Fukutoku-Oka-no-Ba eruption from 13 to 15 of August, 2021 (Maeno, F., T. Kaneko, M. Ichihara, Y.J. Suzuki, A. Yasuda, K. Nishida, and T. Ohminato, submitted to Communications Earth & Environment). The file is in Matlab data format in the following foramt: data.time (matlab date format) data.ph (band-passed data at 5-15 Hz with sampling rate of 100 Hz) data.lat (Station latitude) data.lon (Station longitude) data.elv (Station elevation in meter above sea level) data.sensor (Sensor type) data.unit (Unit of data.ph)

The data have been recorded by the Volcano Research Center of the Earthquake Research Institute of University of Tokyo supported by the Earthquake and Volcano Hazards Observation and Research Program of MEXT. The observation has been helped by the Japan Meteorological Agency.