popocatepetl (aka el popo) is the second highest peak in mexico at 17,882 feet or 5,542 meters, behind iztaccihuatl. it is about 42 miles or 70 km southeast of mexico city. it erupted for the first time in about 70 years during 1993/4, and has erupted on and off to some degree since. el popo mostly emits smoke, ash and stone. we were flying at 39,000 feet, so this kind of stood out and I was lucky to have seen it after the pilot mentioned that mexico city was coming up....
probably worth a large view