ami ▁causing ▁waves ▁of ▁ ▁was ▁reported ▁in ▁Bes uki , ▁East ▁Java ▁before ▁mid night ▁and ▁another ▁exceed ed ▁ ▁in ▁the ▁Mol u cca ▁Islands . ▁The ▁er u ption ▁column ▁reached ▁the ▁str atos phere ▁at ▁an ▁alt itude ▁of ▁more ▁than ▁. ▁Co ar ser ▁ash ▁particles ▁fell ▁one ▁to ▁two ▁weeks ▁after ▁the ▁er u ptions , ▁while ▁fin er ▁particles ▁stayed ▁in ▁the ▁atmosphere ▁for ▁months ▁to ▁years ▁at ▁an ▁alt itude ▁of ▁. ▁There ▁are ▁various ▁estimates ▁of ▁the ▁volume ▁of ▁ash ▁em itted : ▁a ▁recent ▁study ▁estimates ▁a ▁dense - rock ▁equivalent ▁volume ▁for ▁the ▁ash ▁of ▁ ▁and ▁a ▁dense - rock ▁equivalent ▁volume ▁of ▁ ▁for ▁the ▁py ro cl astic ▁flows . ▁Long itud inal ▁wind s ▁spread ▁these ▁fine ▁particles ▁around ▁the ▁glo be , ▁creating ▁optical ▁phen omena . ▁Between ▁ 2 8 ▁June ▁and ▁ 2 ▁July , ▁and ▁between ▁ 3 ▁September ▁and ▁ 7 ▁October ▁ 1 8 1 5 , ▁prolong ed ▁and ▁br illi antly ▁col oured ▁sun sets ▁and ▁tw il ights ▁were ▁frequently ▁seen ▁in ▁London , ▁England . ▁Most ▁commonly , ▁p ink ▁or ▁pur ple ▁colours ▁appeared ▁above ▁the ▁horizon ▁at ▁tw il ight ▁and ▁orange ▁or ▁red ▁near ▁the ▁horizon . ▁ ▁F atal ities ▁ ▁The ▁number ▁of ▁fatal ities ▁has ▁been ▁estimated ▁by ▁various ▁sources ▁since ▁the ▁nin ete enth ▁century . ▁Swiss ▁botan ist ▁Heinrich ▁Z ol ling er ▁tra ve led ▁to ▁S umb awa