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 - Past 2 Days
Electronic Tilt at Kīlauea East Rift Zone - Past 2 Days
Electronic Tilt at Kīlauea Summit and East Rift Zone - Past Week
Electronic Tilt at Kīlauea Summit and East Rift Zone - Past Month
Above: The blue line shows the radial tilt at Uēkahuna (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.
Real-time Global Positioning System at Kīlauea's summit, past week
South Caldera vertical component
BYRL vertical component
Uwekahuna north component
These plots show the vertical deformation at GPS stations CALS, east deformation at GPS station BYRL (both east of Halema‘uma‘u crater), and north-south deformation at GPS station UWEV (on the northwest caldera rim near HVO). Positive changes indicate uplift (for CALS), horizontal motion to the east (for BYRL), or horizontal motion to the north (for UWEV), and negative changes indicate subsidence or horizontal motion to the east or south.
Global Positioning System - Kīlauea Summit
Past Five Years
Global Positioning System - Pu‘u ‘Ō‘ō Cone
Past Five 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.