Patagonia’s icefields, Australia’s changing tides, and volcanic activity in Alaska are among the images captured by Nasa and the ESA this month

Alaska’s remote Bogoslof Island volcano erupted in a series of explosions starting in December 2016, triggering the highest aviation alert as it shot ash plumes at least 35,000ft into the atmosphere. By monitoring the volcano via satellite and seismologic data, scientists can provide a warning of when further eruptions could pose a risk to aircraft. This image shows just a small puff of smoke rising from the volcano, while a sediment plume drifts towards the top left of the image, turning the Bering Sea a bright blue-green.

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