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Tilt and GPS Deformation Data

Map of Selected Deformation Stations


For more information on how electronic tiltmeters and GPS receivers help monitor the deformation of Kīlauea Volcano, see the HVO Deformation page. Click image for larger map.
Electronic Tilt at Kīlauea Summit and East Rift Zone - Past Week
Kilauea Summit and East Rift Zone Tilt for the past week
Electronic Tilt at Kīlauea Summit and East Rift Zone - Past Month
Kilauea Summit and East Rift Zone tilt for the past month
Above: The blue line shows the radial tilt at Uwēkahuna (UWE), on the northwest rim of Kīlauea's caldera. The green line is radial tilt at Pu‘u ‘Ō‘ō (POC), on the north flank of Pu‘u ‘Ō‘ō cone. These are recorded by continuously operating electronic tiltmeters. Positive changes often indicate inflation of the magma storage areas beneath the caldera or Pu‘u ‘Ō‘ō, but may also result from heavy rainfall or, occasionally, instrumental malfunctions.


Global Positioning System - Kīlauea Summit

Past Year

Kilauea Summit cross-caldera GPS deformation for the past year

Past Five Years

Kilauea Summit cross-caldera GPS deformation for the past 5 years
Global Positioning System - Pu‘u ‘Ō‘ō Cone

Past Year

Puu Oo Cone cross-crater GPS deformation for the past year

Past Five Years

Puu Oo Cone cross-crater GPS deformation for the past 5 years
Above SUMMIT GPS: Change in distance between two Global Positioning System (GPS) stations located on opposite sides of Kīlauea's caldera. A rapid increase in distance can be interpreted as inflation of the summit magma reservoir or Pu‘u ‘Ō‘ō magma storage chamber. Above Pu‘u ‘Ō‘ō GPS: Change in distance between two station near Pu‘u ‘Ō‘ō. A rapid increase in distance can be interpreted as inflation of the summit magma reservoir or Pu‘u ‘Ō‘ō magma storage chamber.