Infrasound records at Grey glacier, Patagonia, Chile.

A four-element infrasound array was deployed at Grey Glacier (Torres del Paine, Patagonia, Chile) between February 4–11, 2025. This dataset includes infrasound array data recorded by the four sensors in MiniSEED (.mseed) format, along with detection results from array processing provided in MATLAB (.mat) format.The GREY array is composed of four Item differential pressure transducers with a sensitivity of 400 mV/Pa, operating in the frequency band of 0.01–200 Hz and a full-scale pressure range of ±25 Pa. Each sensor is connected to a 24-bit Güralp Minimus digitizer, sampling at 100 Hz and synchronized with GPS time.Here the coordinates of the four sensors:CH1: 50.986 °S 73.27372 °W 80mCH2: 50.98554 °S 73.27427 °W 80mCH3: 50.98583 °S 73.27364 °W 68mCH4: 50.98573 °S 73.27385 °W 65mArray processing was performed using multi-channel cross-correlation techniques in the time domain, applied to moving time windows across all array elements. The data were bandpass-filtered between 2 and 20 Hz and analyzed using 5-second moving windows with 90% overlap (shift = 0.5 s). The detections characterize the infrasound wavefield in terms of pressure amplitude, backazimuth and apparent velocity.