Very-long-period seismic signals (VLPs) are commonly used to interpret volcanic plumbing systems and the dynamics of eruptions. The standing conceptual model for VLPs in low-viscosity systems links them to the driving mechanism for strombolian explosions, involving a gas slug rising in the conduit, generating a VLP, and bursting at a lava-free surface. The model for strombolian eruptions is based on observations of bubble bursting at an observable lava lake at Heimaey Volcano, Iceland, in the 1970s and has formed the basis for decades of detailed analysis and interpretation of VLPs at volcanoes worldwide, including Kilauea (Hawai’i), Erebus (Antarctica), Yasur (Vanuatu), Fuego (Guatemala), and Stromboli (Italy) volcanoes.