Strain Signals Before and During Paroxysmal Activity at Stromboli Volcano, Italy

Key Points Borehole dilatometers are widely used to monitor open- and closed-conduits volcanoes, recording areal strain changes due to volcanic sources A dilatometer recorded strain changes minutes before eruptions onset for 2019 activity: Correlation with 2007 paroxysm suggests common source For the first time a comparison high-frequency, high-sensitivity strain data for the 2007 and both 2019 vulcanian explosions are presented