On Geomagnetic Variations after the 2025 Myanmar Earthquake

Using ground-based low-latitude magnetometer observation stations, the intensification of geomagnetic field variations associated with a strong earthquake in Myanmar in 2025, located more than a 1000 km from the stations, was studied. The observed geomagnetic variations were interpreted as the result of propagation of three types of waves caused by the earthquake: seismic Rayleigh waves generating acoustic waves, atmospheric internal waves generated at the earthquake epicenter, and slow magnetohydrodynamic waves caused by the dissipation of acoustic-gravity waves in the lower ionosphere.