Global Volcanism Program | Image GVP-08275
The flat-bottomed Diego de la Haya crater in the background was the site of Irazú's first and largest historical eruption in 1723. The eruption began on February 16, 1723 and reached peak intensity in February and March. The eruption continued sporadically until December 11. Incandescent material was ejected, and ash fell on the cities of Cartago, San José, Barva, and Heredia. The west rim of the 400 x 500 m wide Diego de la Haya crater has been truncated by the presently active summit crater (lower left).
Photo by Lee Siebert, 1998 (Smithsonian Institution).