b'2018-05-192018-05-182018-05-172018-05-16Time [UTC]2018-05-152018-05-14 23Carnegie volcanologists Diana Roman (left in left image) and Kathleen McKee are installing one of the Carnegie Quick Deploy Boxes developed with the support of The Brinson Foundation.2018-05-13Hlne Le Mvel (right image) is taking measurements from a gravimeter used at Stromboli. Images courtesy Hlne Le Mvel, Carnegie Institution for Science 2018-05-12 0 102030 4050607080901.0normalized amplitudemeasurements of material erupted (i.e., gas and ash)0.5to inflation signals from shallow accumulation of gas. 0.0 0.5However, large deformation signals followed by large-scale eruptions produce highly complex acoustics. 1.0 0 102030 4050607080900 Volcanologists are currently working to quantifytime (s)precursory deformation and erupted material in such2018-05-19large-scale eruptions. In contrast, the objective of the Stromboli work was to scale the experiments2018-05-18down such that the team could link small-scale signals with infrasound. 2018-05-17The researchers deployed gas instrumentation and2018-05-16Time [UTC]compared those measurements to the gas volumes derived from infrasound and seismicity to determine the volumes of gas accumulated and emitted. Using volcano2018-05-15infrasound measurements, they were able to quantify the flow rate of simple explosions. The result is an2018-05-14important step for eventual forecasts of eruption size. 2018-05-13Very-long-period seismic signals (VLPs) usually indicate the movement of magma and or gas in the subsurface, often repeat2018-05-12over time, and produce highly similar waveforms indicating that the0 102030 405060708090generating process is nondestructive. Kathleen McKee and Diana Roman found two families of repeating VLPs in the Stromboli seismic1.0normalized amplitudedata from May 2018. Images a) and b) show the vertical component of Family 1, which repeats 500+ times over 7 days. Images c) and d)0.5show the same for Family 2, which repeats about 200 times over the0.0same period. The black horizontal bars in the right of a) and c) show when explosions occurred. Given there are less Family 2 VLPs and 0.5more bars indicating explosions in image c), Family 2 VLPs are more often correlated with explosions than Family 1 VLPs.1.0 0 0 1100 220033004400 5500 6600 7700 88009900Image courtesy Kathleen McKee, Carnegie Institution for Sciencetime (s)time (s)'