Two M5+ earthquakes hit Zagreb this morning, causing a lot of damage in the historical centre. The magnitude 5.4 event hit at 6:24 in the morning (local time), the second (M5.0) shortly after 7h. The waveforms are clearly recorded at our test station near Sion, in the Valais, 670 km away. Zooming on the wave onset of the two events reveals a high level of similarity; the earthquakes likely happened on the same fault.
