Knowra Volcano seismology Volcano seismology Volcano seismology uses earthquakes, continuous seismic signals, and ground deformation to investigate magma storage, movement, and volcanic processes.
Volcanic earthquake : An earthquake caused by processes associated with a volcano, including brittle rock fracture or fluid movement. Its timing, location, and waveform can identify changes in volcanic activity.
Seismometer : An instrument that detects and records ground motion. Its records provide the basic observations for locating volcanic earthquakes and analyzing tremor.
Volcano monitoring : The systematic observation of volcanic activity to detect change and support hazard assessment. Volcano seismology supplies continuous indicators used in monitoring networks.
Mount St. Helens : An active stratovolcano in Washington State, known for its 1980 eruption and later dome-building activity. Its seismicity and deformation documented magma intrusion and dome growth during renewed activity.
Volcanic tremor source : The physical process that generates sustained seismic oscillations at a volcano. Different mechanisms can produce similar tremor, complicating interpretations of magma and gas movement.
Volcanic tremor : A sustained seismic signal associated with processes such as fluid flow, gas release, or repeated fracture. Changes in tremor can track persistent movement of magma or gas.
Hypocenter : The point within Earth where an earthquake begins. Patterns of volcanic hypocenters can trace active fractures and migrating fluid pathways.
Volcanic eruption forecasting : The estimation of an eruption’s likelihood, timing, or characteristics from observations and models. Seismicity and deformation can signal escalating unrest, though they do not guarantee an eruption.
Kīlauea : An active shield volcano on the island of Hawaiʻi. Its frequent earthquakes and ground deformation have revealed changing magma storage and rift-zone intrusion.
Magma chamber : A subsurface region where magma accumulates, often as interconnected lenses or reservoirs rather than a single cavity. Seismic methods infer its structure indirectly, and its geometry can remain uncertain.
Show all 25