Miniseed files (.mseed), and .chan file for the waveforms of the 2010 M7.8 Mentawai tsunami earthquake, used in the study of Sahakian et al. (2019). This includes one miniseed (.mseed) file per channel of a station recording the event that was used here, from beginning to end of the event. The units of the data inside each file are cm/sec2,and the time in seconds. Inside the .zip file is the .chan file, describing the station’s information (network, station, location, channel, longitude/latitude/elevation, sampling rate, gain, units). The gain is 1 (the units in the miniseed file are the same as described in the .chan file). If you use these data, please cite the associated publication: V.J. Sahakian, D. Melgar, M. Muzli (2019). Weak Near-Field Behavior of a Tsunami Earthquake: Towards Real-Time Identification for Local Warning, Geophysical Research Letters, doi:10/1029/2019GL083989.