Semeru (East Java, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 . The full report is as follows: DISCRETE ERUPTION TO FL140 OBS AT 09/1720Z MOV SW to 14000 ft (4300 m) Makushin (Aleutian Islands): (9 Sep) The Alaska Volcano Observatory (AVO) reported…