Caldera volcano

Quilotoa volcano's 3-km wide caldera (Ecuador) w/ steep-sided wall above the surface of a 240-m deep lake w/ greenish color due to dissolved minerals. Collapse of Quilotoa following VEI-6 eruption w/c produced pyroclastic flows & lahars about 800 radiocarbon yrs ago formed this caldera.

Taal Volcano is a large caldera filled by Taal Lake in the Philippines. Located in the province of Batangas, the volcano is one of the most active volcanoes in the country, with 34 recorded historical eruptions, all of which were concentrated on Volcano Island, near the middle of Taal Lake. Credit: (https://www.flickr.com/people/therealbrute/)

Taal Volcano, Batangas

A close shot of the Taal Volcano, the smallest active volcano in the world.

Taal Volcano, Philippines, captured by Sentinel-2 on 12/23/19. Recently, the volcano violently erupted forcing the evacuation of thousands of people. Volcano Taal is surrounded by Taal Lake at the southern end of Luzon, the most populous island of the Philippines. Similar to Crater Lake in Oregon, Taal Lake formed when prehistoric eruptions caused the ground to collapse and form a caldera. Taal Volcano has erupted 33 times since the 1500s.

And it was by a Filipino scientist!