1. Berk, A., Bernstein, L. S. and Robertson, D. C. 1987. “MODTRAN: A Moderate Resolution Model for LOWTRAN”. Technical report, AFGL-TR-87-0220, Geophysics Laboratory, Hanscom AFB, MA, USA
2. BGVN (Bulletin of the Global Volcanism Network). Report no. 32:10, Caldera collapse in April 2007; large E-flank lava flows. Available online at:www.volcano.si.edu/world/volcano.cfm?vnum=0303-02=&volpage=var#bgvn_3212(accessed 21 May 2010)
3. BGVN (Bulletin of the Global Volcanism Network). Report no. 32:12, Eruption on 30 September sends lava flows to the ocean; fatalities among soldiers. Available online at:www.volcano.si.edu/world/volcano.cfm?vnum=0201-01=&volpage=var#bgvn_3210(accessed 21 May 2010)
4. BGVN (Bulletin of the Global Volcanism Network). Report no. 33:06, Large explosive eruption started on 12 July, ash plumes initially rose to 15.2 km altitude. Available online at:http://www.volcano.si.edu/world/volcano.cfm?vnum=1101-29&volpage=var#bgvn_3306(accessed 21 May 2010)