Seismic and infrasound data for the April 15, 2024, hydrothermal explosion on Porcelain Terrace at Norris Geyser Basin

Seismic and infrasound data for the April 15, 2024, hydrothermal explosion on Porcelain Terrace at Norris Geyser Basin.  Top plot is seismic data from the YNM station, located at the Norris Geyser Basin Museum.  Middle plot is seismic data from station YNB, in the Ragged Hills of Norris Geyser Basin. Bottom plot is infrasound data from station YNB.  The pressure change at the YNB infrasound station suggests an explosion source. The seismic signal appears first at station YNM, which is closer to the explosion site.  There was a time delay of about 1.3 seconds between the signal being received at YNB versus YNM (red dashed line).  Given the distance between those stations, this delay corresponds to the speed of sound, indicating that the seismic signal was caused by the air wave from the explosion.  Plot generated by Alex Iezzi (USGS).