On April 22, 2015, the Chilean volcano Calbuco erupted, providing the most dramatic and awe-inspiring photographs I’ve ever seen of such an event.

On that day, photographer Martin Heck was right on the scene, by happenstance taking time-lapse footage on the neighboring Osorno volcano. When Calbuco went off, he hurriedly set up and shot video that is, no exaggeration, some of the best I have ever seen of any volcanic eruption ever.

Even better, there were no reported deaths or injuries, despite the huge scale of the eruption. It lasted for well over an hour, and launched a plume 10 kilometers into the sky.

What do you think?