The “China Seismological Reference Model” (CSRM) Product Center is pleased to announce an update to the online mapping tool for the China Seismological Reference Model 1.0 (CSRM-1.0). CSRM-1.0, constructed based on seismic data recorded by 4,435 stations between 1990 and 2020, provides three-dimensional (3D) P-wave velocity (Vp), S-wave velocity (Vs), and crustal thickness within the top 100 km of the crust and uppermost mantle in continental China.

The mapping tool enables online visualization and distribution of CSRM-1.0 and is accessible from http://chinageorefmodel.org under “CSRM-1.0 Visualizer” or the following direct link http://chinageorefmodel.org/csrm-visualizers/csrm-1-0-visualizer. The model and related seismic datasets can be accessed https://doi.org/10.5281/zenodo.8103561.

Updated Features

1. Project seismicity onto 2D Vertical Profiles of CSRM-1.0 Vp and Vs (Figure 1)

• Project seismicity onto regional 3D Vp and Vs structures (Figure 2)

The figures show examples of the 2026 Nagqu earthquake projected onto the CSRM-1.0 Vp and Vs structures.

Users can interactively adjust the color-bar scales in all plots to improve visualization.

The CSRM Product Center welcomes you and your colleagues to join the “CSRM” email group, so as to receive the latest CSRM news and releases in a timely manner. If you are interested in joining the email list, please send your name + organization + email address to chinageorefmodel.org@gmail.com.