Roundup of Global Volcanic Activity
Colima (Western Mexico): Explosions continue to occur at the volcano. Although their frequency has decreased a lot compared to a few weeks ago, now often with intervals of 10+ hours, they are now often stronger, generating ash columns that rise 3-4 km above the volcano’s summit crater and showering the entire flank with incandescent bombs such as the one our friend Hernando took yesterday morning. The lava flow on the southern side is no longer active. What causes the change in activity is difficult to say, but it likely reflects a decrease in the magma supply rate, i.e. lower speed of magma rise inside the conduit, enabling a greater pressure build-up released less frequently, but during larger explosions.