Volcano Name VNUM Latitude Longitude Region Sub-region Volcano Type Unit name Eruption start day Eruption start month Eruption start year Year BP Date Error Dating technique Date quality Alternate values Tephra fall deposit volume Qualifier Error Alternate values Tephra fall DRE volume Qualifier Error Quality Alternate values Ignimbrite deposit volume Qualifier Error Quality Alternate values Ignimbrite DRE volume Qualifier Error Quality Alternate values Primary intra caldera deposit volume Qualifier Error Quality Alternate values Primary intra caldera DRE volume Qualifier Error Quality Alternate values Bulk deposit volume Qualifier Error Quality Alternate values Bulk DRE volume Qualifier Error Quality Alternate values Magma Type Magma Density Magnitude Qualifier Derivation Alternate values VEI Qualifier Derivation Alternate values Column height Min Column height Max Column height Average Alternate values Intensity Min Intensity Max Intensity Average Alternate values "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "1980 AD" "27" "3 " "1980 " "-30" "" "Historical records" "High quality" "No" "1.2" "" "" "No" ".3" "" "" "?" "No" ".14" "" "" "?" "No" ".05" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "1.3" "" "" "1" "Yes" ".44" "" "" "1" "Yes" "Dacite" "" "4.8" "" "Literature" "No" "5" "" "Literature" "No" "" "" "" No "" "11.06" "" Yes "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "T (Goat Rocks)" "15" "01" "1800 " "150" "" "Dendrochronology" "High quality" "No" "1.5" "" "" "No" ".4" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "1.5" "" "" "3" "Yes" ".4" "" "" "3" "No" "Dacite" "" "5" "" "Calculated" "No" "5" "" "Literature" "No" "" "16" "" No "" "10.19" "" Yes "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "We (Kalama)" "15" "01" "1482 " "468" "" "Dendrochronology" "High quality" "No" "1.5" "" "" "No" ".4" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "1.5" "" "" "3" "Yes" ".4" "" "" "3" "No" "Dacite" "" "5" "" "Calculated" "No" "5" "" "Literature" "No" "" "21" "" No "" "10.64" "" Yes "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "Wn (Kalama)" "15" "01" "1480 " "470" "" "Dendrochronology" "High quality" "No" "7.7" "" "" "No" "2" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "7.7" "" "" "3" "No" "2" "" "" "3" "No" "Dacite" "" "5.7" "" "Calculated" "No" "5" "" "Literature" "No" "" "24" "" No "" "10.7" "" Yes "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "Ps/Pu (Pine Creek)" "" "" "-530 " "2480" "" "Radiocarbon (corrected)" "Low quality" "No" "1.2" "" "" "No" ".3" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "1.2" "" "" "3" "No" ".3" "" "" "3" "No" "Dacite" "" "4.9" "" "Calculated" "No" "5" "" "Literature" "No" "11" "15" "" No "9.54" "10.06" "" Yes "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "Ye (Smith Creek)" "" "" "-1770" "3720" "100" "Tephrochronology" "Low quality" "No" "3.5" "" "" "No" ".9" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "3.5" "" "" "3" "Yes" ".9" "" "" "3" "Yes" "Dacite" "" "5.4" "" "Calculated" "No" "5" "" "Literature" "No" "" "23" "" Yes "" "10.6" "" Yes "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "Yn (Smith Creek)" "" "" "-1860" "3810" "" "Radiocarbon (corrected)" "Low quality" "No" "15.3" "" "" "No" "4" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "15.3" "" "" "3" "Yes" "4" "" "" "3" "Yes" "Dacite" "" "6" "" "Calculated" "No" "6" "" "Literature" "No" "" "31" "" No "" "11" "" No "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "Yb (Smith Creek)" "" "" "-2340" "4290" "" "Radiocarbon (corrected)" "Low quality" "No" "1.2" "" "" "No" ".3" "" "" "?" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "1.2" "" "" "3" "Yes" ".3" "" "" "3" "No" "Dacite" "" "4.9" "" "Calculated" "No" "5" "" "Literature" "No" "" "22" "" No "" "10.48" "" Yes "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "J (Jg, Jb, Jy) (Swift Creek)" "" "" "" "12800" "" "Radiocarbon (corrected)" "Medium quality" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "4.32" "" "" "1" "No" "1.8" "" "" "1" "No" "Andesite-Dacite" "" "5.6" "" "Calculated" "No" "5" "" "Calculated" "No" "" "" "" No "" "" "" No "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "J (Jg, Jb, Jy) (Swift Creek)" "" "" "" "12800" "" "Radiocarbon (corrected)" "Medium quality" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "4.32" "" "" "1" "No" "1.8" "" "" "1" "No" "Andesite-Dacite" "" "5.6" "" "Calculated" "No" "5" "" "Calculated" "No" "" "" "" No "" "" "" No "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "S (So, Sg) (Swift Creek)" "" "" "" "16000" "" "Radiocarbon (corrected)" "Medium quality" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "3.6" "" "" "1" "No" "1.5" "" "" "1" "No" "Dacite" "" "5.6" "" "Calculated" "No" "5" "" "Calculated" "No" "" "" "" No "" "" "" No "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "M (Mm, Mp, Mc, Mo, Mg) (Cougar)" "" "" "" "20000" "" "Not Available" "Low quality" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "2.04" "< " "" "1" "No" ".85" "< " "" "1" "No" "" "" "5.3" "< " "Calculated" "No" "5" "" "Literature" "No" "" "" "" No "" "" "" No "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "Cb (Ape Canyon)" "" "" "" "40000" "" "Radiocarbon and stratigraphy" "Low quality" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "1" ">=" "" "0" "No" ".4" ">=" "" "0" "No" "Dacite" "" "5.3" "" "Calculated" "No" "5" "? " "Literature" "No" "" "" "" No "" "" "" No "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "C (Cs, Cy, Cm, Cw, Ct) (Ape Canyon)" "" "" "" "42500" "" "Stratigraphy" "Low quality" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "10.32" "" "" "1" "No" "4.3" "" "" "1" "No" "Dacite" "" "6" "" "Calculated" "Yes" "" "" "" "" "" "" "" No "" "" "" No "St. Helens" "321050" "46.2" "-122.1833333" "Canada and Western USA" "USA (Washington)" "Stratovolcano(es)" "Summer Lake OO tephra" "" "" "" "300000" "" "Stratigraphy" "Low quality" "No" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "2.4" "> " "" "1" "No" "1" "> " "" "1" "No" "" "" "5.4" "" "Calculated" "No" "5" "" "Literature" "No" "" "" "" No "" "" "" No