Detection of Magma Reservoir beneath the Changbaishan Volcanic Region through Seismic Ray Tracing
Abstract
The unrest of the Changbaishan (CBS) volcano implies a magma reservoir underneath this volcano. To detect and study this magma reservoir, we judiciously selected 97 deep earthquakes near CBS with available seismograms recorded by permanent and temporal stations in NE China. We observed significant S-wave shadows (attenuation) and P-wave delays from many seismograms. Seismic ray tracing simulations show that those rays that exhibit S-wave shadows traverse the topmost upper mantle and the crust, indicating the presence of molten magma at these depths. The P-wave delays are observed over a broader region and commonly traverse the lower part of the upper mantle. It suggests a broad low-velocity zone beneath CBS. Further 3D ray tracing simulations will help determine the location, range, and degree of melting of the magma reservoir.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 2022
- Accession Number
- AD1227958
Entities
People
- Youlin Chen
Organizations
- Array Information Technology, Inc.