Volcano Name: | St. Helens | Smithsonian Inst ID (SI_VNUM): | 321050 |
Alternate Name: |
Agua Caliente Hot Springs Dogs Head East Dome Goat Rocks Harry's Spa Hot Springs Lawalaclough Lawelatla Loowit Boulder Basin Hot Springs Loowit Source Hot Springs Loowit Travertine Hot Springs Loowitlatkla Milt's Pond Hot Springs Northwest Dome Steamy Gulch Hot Springs Step Canyon Hot Springs Sugar Bowl Tahonelatclah |
Volcano Type: | Stratovolcano(es) |
Latitude: | 46.2000000000 | ||
Longitude: | -122.1833333000 | ||
Region: | Canada and Western USA | Sub Region: | USA (Washington) |
Date Entered: | 02/05/2012 |
Eruption Start Date: | 27/3 /1980 | Date Error: | ||
Eruption End Date: | Dating Technique: | Historical records | ||
Eruption Date Quality: | High quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 0.440 (Literature) | ||
Bulk deposit volume (km3): | 1.300 (Literature) | ||
Ignimbrite DRE Volume (km3): | 0.050 (Calculated) | ||
Ignimbrite Deposit Volume : | 0.140 (Calculated) | ||
Magnitude : | 4.800 (Literature) | ||
Maximum Intensity : | 11.060 (Column Height) | ||
Maximum VEI : | 5.000 (Literature) | ||
Tephra fall DRE Volume (km3): | 0.300 (Literature) | ||
Tephra fall Deposit Volume (km3): | 1.200 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | 15/01/1800 | Date Error: | ||
Eruption End Date: | Dating Technique: | Dendrochronology | ||
Eruption Date Quality: | High quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 0.400 (Literature) | ||
Bulk deposit volume (km3): | 1.500 (Literature) | ||
Magnitude : | 5.000 (Calculated) | ||
Maximum Column Height (km): | 16.000 (Literature) | ||
Maximum Intensity : | 10.190 (Column Height) | ||
Maximum VEI : | 5.000 (Literature) | ||
Tephra fall DRE Volume (km3): | 0.400 (Literature) | ||
Tephra fall Deposit Volume (km3): | 1.500 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | 15/01/1482 | Date Error: | ||
Eruption End Date: | Dating Technique: | Dendrochronology | ||
Eruption Date Quality: | High quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 0.400 (Literature) | ||
Bulk deposit volume (km3): | 1.500 (Literature) | ||
Magnitude : | 5.000 (Calculated) | ||
Maximum Column Height (km): | 21.000 (Literature) | ||
Maximum Intensity : | 10.640 (Column Height) | ||
Maximum VEI : | 5.000 (Literature) | ||
Tephra fall DRE Volume (km3): | 0.400 (Literature) | ||
Tephra fall Deposit Volume (km3): | 1.500 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | 15/01/1480 | Date Error: | ||
Eruption End Date: | Dating Technique: | Dendrochronology | ||
Eruption Date Quality: | High quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 2.000 (Literature) | ||
Bulk deposit volume (km3): | 7.700 (Literature) | ||
Magnitude : | 5.700 (Calculated) | ||
Maximum Column Height (km): | 24.000 (Literature) | ||
Maximum Intensity : | 10.700 (Eruption Rate) | ||
Maximum VEI : | 5.000 (Literature) | ||
Tephra fall DRE Volume (km3): | 2.000 (Literature) | ||
Tephra fall Deposit Volume (km3): | 7.700 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | -530 | Date Error: | ||
Eruption End Date: | Dating Technique: | Radiocarbon (corrected) | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 0.300 (Literature) | ||
Bulk deposit volume (km3): | 1.200 (Literature) | ||
Magnitude : | 4.900 (Calculated) | ||
Maximum Column Height (km): | 15.000 (Literature) | ||
Maximum Intensity : | 10.060 (Column Height) | ||
Maximum VEI : | 5.000 (Literature) | ||
Minimum Column Height (km): | 11.000 (Literature) | ||
Minimum Intensity : | 9.540 (Column Height) | ||
Tephra fall DRE Volume (km3): | 0.300 (Literature) | ||
Tephra fall Deposit Volume (km3): | 1.200 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | -1770 | Date Error: | 100 | |
Eruption End Date: | Dating Technique: | Tephrochronology | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 0.900 (Literature) | ||
Bulk deposit volume (km3): | 3.500 (Literature) | ||
Magnitude : | 5.400 (Calculated) | ||
Maximum Column Height (km): | 23.000 (Literature) | ||
Maximum Intensity : | 10.600 (Eruption Rate) | ||
Maximum VEI : | 5.000 (Literature) | ||
Tephra fall DRE Volume (km3): | 0.900 (Literature) | ||
Tephra fall Deposit Volume (km3): | 3.500 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | -1860 | Date Error: | ||
Eruption End Date: | Dating Technique: | Radiocarbon (corrected) | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 4.000 (Literature) | ||
Bulk deposit volume (km3): | 15.300 (Literature) | ||
Magnitude : | 6.000 (Calculated) | ||
Maximum Column Height (km): | 31.000 (Literature) | ||
Maximum Intensity : | 11.000 (Eruption Rate) | ||
Maximum VEI : | 6.000 (Literature) | ||
Tephra fall DRE Volume (km3): | 4.000 (Literature) | ||
Tephra fall Deposit Volume (km3): | 15.300 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | -2340 | Date Error: | ||
Eruption End Date: | Dating Technique: | Radiocarbon (corrected) | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 0.300 (Literature) | ||
Bulk deposit volume (km3): | 1.200 (Literature) | ||
Magnitude : | 4.900 (Calculated) | ||
Maximum Column Height (km): | 22.000 (Literature) | ||
Maximum Intensity : | 10.480 (Eruption Rate) | ||
Maximum VEI : | 5.000 (Literature) | ||
Tephra fall DRE Volume (km3): | 0.300 (Literature) | ||
Tephra fall Deposit Volume (km3): | 1.200 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | 12800 BP | Date Error: | ||
Eruption End Date: | Dating Technique: | Radiocarbon (corrected) | ||
Eruption Date Quality: | Medium quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 1.800 (Literature) | ||
Bulk deposit volume (km3): | 4.320 (Calculated) | ||
Magnitude : | 5.600 (Calculated) | ||
Maximum VEI : | 5.000 (Calculated) |
Magma: | Andesite-Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite | |||
Andesite |
Eruption Start Date: | 16000 BP | Date Error: | ||
Eruption End Date: | Dating Technique: | Radiocarbon (corrected) | ||
Eruption Date Quality: | Medium quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 1.500 (Literature) | ||
Bulk deposit volume (km3): | 3.600 (Calculated) | ||
Magnitude : | 5.600 (Calculated) | ||
Maximum VEI : | 5.000 (Calculated) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | 20000 BP | Date Error: | ||
Eruption End Date: | Dating Technique: | Not Available | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | < 0.850 (Literature) | ||
Bulk deposit volume (km3): | < 2.040 (Calculated) | ||
Magnitude : | < 5.300 (Calculated) | ||
Maximum VEI : | 5.000 (Literature) |
Eruption Start Date: | 40000 BP | Date Error: | ||
Eruption End Date: | Dating Technique: | Radiocarbon and stratigraphy | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | >= 0.400 (Assumed) | ||
Bulk deposit volume (km3): | >= 1.000 (Assumed) | ||
Magnitude : | 5.300 (Calculated) | ||
Maximum VEI : | ? 5.000 (Literature) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | 42500 BP | Date Error: | 7500 | |
Eruption End Date: | Dating Technique: | Stratigraphy | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | 4.300 (Literature) | ||
Bulk deposit volume (km3): | 10.320 (Calculated) | ||
Magnitude : | 6.000 (Calculated) |
Magma: | Dacite | ||
Calculated Density: | |||
Rock Classification: | |||
Dacite |
Eruption Start Date: | 300000 BP | Date Error: | ||
Eruption End Date: | Dating Technique: | Stratigraphy | ||
Eruption Date Quality: | Low quality | Preferred Date: | Y | |
Bulk DRE Volume (km3): | > 1.000 (Literature) | ||
Bulk deposit volume (km3): | > 2.400 (Calculated) | ||
Magnitude : | 5.400 (Calculated) | ||
Maximum VEI : | 5.000 (Literature) |