Light curve observed by and retrieved from GRBAlpha related to the event of GRB 230307A. The trigger is shown with the vertical dashed red line. The total retrieved time span was a complete orbit in this case; therefore, the South Atlantic Anomaly (SAA) and four passages through polar belts are clearly visible (i.e., leaving SAA, entering and leaving the northern and southern polar rings). This prominent event has a comparable amplitude to the increased background level at the polar regions.