At the Italian volcano Stromboli a stronger explosion occurred this morning at 10.18 am (local time). It apparently triggered a collapse in the crater area and a pyroclastic flow, was created. Volcanic ash rose several hundred meters above crater height. It is the 2nd stronger-than-usual eruption within 6 days. The other activity parameters are remarkably inconspicuous or very low. This morning the LGS reported very weak eruptions with an acoustic pressure of only 0.05 bar.