A new study aims to determine whether giant volcanic eruptions are related to BLOBS—mobile basal structures related to well-known large low-shear-velocity provinces (LLSVPs). Comparing seismic tomography data with their models, the researchers found evidence of slow-moving blobs that shift at about one centimeter per year. “This work highlights the importance of mantle plumes in acting as ‘magma highways’ to the surface, creating these giant eruptions. The researchers found that eruptions usually take place above or near these blobs, suggesting that mantle plumes also tilt as they rise up toward the lithosphere. But with a greater understanding of how BLOBS move, the scientists are now eager to analyze their chemical composition by tracking their evolution over time.