Time-lapse photography with particle image velocimetry and seismo-acoustic tilt signals for the night of January 7. Note clearly visible inflation and deflation of the dome, the active lava flow to the south (left side of animation), and visible explosions around 21:50, 22:15, and 24:31.
Animation of nighttime photographs of the dome taken from Santa Maria with full-image PIV.
credit: Ben Andrews and Jeff Johnson
Seismo-acoustic tilt signals for the period covered by the above animation.
credit: Jeff Johnson
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