Scientific monitoring provides advanced warning.
It’s mid-morning and smoke is rising through the thatched roof of the mud hut far below; coffee beans are being roasted. Matt stands perilously on the edge of a cliff, balancing as he drills into an outcropping of black, volcanic rock. He pauses to check whether the hole is big enough to fit the metal cylinder he has tucked into his back pocket. It’s not. He adjusts his hat against the Ethiopian sun, leaving prints of sweat and rock dust, and starts the roar of the hammer drill again.