BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:What can evolving seismic anisotropy tell us about the 2018 Kilaue
 a eruption? - Jessica Johnson (University of East Anglia)
DTSTART:20211117T160000Z
DTEND:20211117T170000Z
UID:TALK161995@talks.cam.ac.uk
CONTACT:Sam Wimpenny
DESCRIPTION:The 2018 eruption of Kilauea volcano in Hawaii was unique in s
 everal ways. One of the interesting aspects was the well recorded incremen
 tal collapse of the summit caldera over the course of three months. This c
 ollapse was accompanied by over 50\,000 earthquakes. These earthquakes tel
 l an interesting story in themselves\, but we are using them to measure se
 ismic anisotropy using shear wave splitting at a spatial and temporal reso
 lution that has not been achieved at volcanoes before. Preliminary results
  suggest that cracking of ring faults associated with the caldera collapse
  can be detected using shear wave splitting\, and hence the timing and evo
 lution of the deformation can be mapped in this way.\n\nSeismic anisotropy
  is also affected by evolving stress and migrating fluids. Here\, we use t
 he unprecedented seismicity to complete the picture of seismic anisotropy 
 in the Lower East Rift Zone (where it has not been imaged previously)\, in
 vestigate the transfer of stress between the propagating intrusion and the
  M6.9 earthquake that occurred concurrently on the décollement\, and how 
 stress and fluids affected the start and end of the eruption.\n\n
LOCATION:Tilley Lecture Theatre (+ Zoom)
END:VEVENT
END:VCALENDAR