We develop a new method to analyze the total electron content (TEC) depression in the ionosphere after a tsunami occurrence. We employ Gaussian process regression to accurately estimate the TEC disturbance every 30 s using satellite observations from the global navigation satellite system (GNSS) network. even over regions without measurements. We face multiple challenges. https://www.ngetikin.com/great-pick-Borstlist-sjalvhaftande-Tesa-hot-grab/