Christopher Harpel
I work with VDAP's foreign partners to better understand the eruption histories and hazards of their dangerous volcanoes. My work focusses on volcanic stratigraphy with an emphasis on field-based projects. I also develop regional and local tephrostratigraphies using ash layers in cores and am developing new applications for long-lived plant species to provide insight into past volcanic activity.
Education and Certifications
Ph.D. from Oregon State University
M.Sc. from New Mexico Institute of Mining and Technology
B.Sc. from Western Washington University
Science and Products
The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes
To mix or not to mix: Details of magma storage, recharge, and remobilization during the Pacheco stage at Misti Volcano, Peru (≤21–2 ka) To mix or not to mix: Details of magma storage, recharge, and remobilization during the Pacheco stage at Misti Volcano, Peru (≤21–2 ka)
The late Pleistocene Sacarosa tephra-fall deposit, Misti Volcano, Arequipa, Peru: Its magma, eruption, and implications for past and future activity The late Pleistocene Sacarosa tephra-fall deposit, Misti Volcano, Arequipa, Peru: Its magma, eruption, and implications for past and future activity
Estratigrafía preliminar del flanco Este del volcán de Santa Ana Estratigrafía preliminar del flanco Este del volcán de Santa Ana
Nuevos datos: Avalancha de escombros de Acajutla, volcán Santa Ana Nuevos datos: Avalancha de escombros de Acajutla, volcán Santa Ana
Azorella compacta's long-term growth rate, longevity, and potential for dating geomorphological and archaeological features in the arid southern Peruvian Andes Azorella compacta's long-term growth rate, longevity, and potential for dating geomorphological and archaeological features in the arid southern Peruvian Andes
The Orange Tuff: A Late Pleistocene tephra-fall deposit emplaced by a VEI 5 silicic Plinian eruption in West Java, Indonesia The Orange Tuff: A Late Pleistocene tephra-fall deposit emplaced by a VEI 5 silicic Plinian eruption in West Java, Indonesia
Geologic field-trip guide of volcaniclastic sediments from snow- and ice-capped volcanoes—Mount St. Helens, Washington, and Mount Hood, Oregon Geologic field-trip guide of volcaniclastic sediments from snow- and ice-capped volcanoes—Mount St. Helens, Washington, and Mount Hood, Oregon
Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields
Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields
40Ar/39Ar dating of the eruptive history of Mount Erebus, Antarctica: Summit flows, tephra, and caldera collapse 40Ar/39Ar dating of the eruptive history of Mount Erebus, Antarctica: Summit flows, tephra, and caldera collapse
Bibliography of literature from 1990-1997 pertaining to Holocene and fumarolic Pleistocene volcanoes of Alaska, Canada, and the conterminous United States Bibliography of literature from 1990-1997 pertaining to Holocene and fumarolic Pleistocene volcanoes of Alaska, Canada, and the conterminous United States
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Radiocarbon ages from sites in Peru generated during joint volcano hazards projects carried out by the U.S. Geological Survey Volcano Disaster Assistance Program, Instituto Geofisico del Peru, and Instituto Geologico, Minero y Metalurgico del Peru Radiocarbon ages from sites in Peru generated during joint volcano hazards projects carried out by the U.S. Geological Survey Volcano Disaster Assistance Program, Instituto Geofisico del Peru, and Instituto Geologico, Minero y Metalurgico del Peru
Radiocarbon ages from sites in El Salvador generated during joint volcano hazards projects carried out by the U.S. Geological Survey Volcano Disaster Assistance Program and El Salvador Ministerio de Ambiente y Recursos Naturales Radiocarbon ages from sites in El Salvador generated during joint volcano hazards projects carried out by the U.S. Geological Survey Volcano Disaster Assistance Program and El Salvador Ministerio de Ambiente y Recursos Naturales
Geochemical data for the Pacheco stage tephra-fall deposits from Misti volcano, Arequipa, Peru Geochemical data for the Pacheco stage tephra-fall deposits from Misti volcano, Arequipa, Peru
Electron microprobe geochemical data for glass from the Khonkho tephra Electron microprobe geochemical data for glass from the Khonkho tephra
Radiocarbon ages, whole-rock geochemical data, and pumice density measurements for the Sacarosa tephra-fall deposit, Misti volcano, southern Peru Radiocarbon ages, whole-rock geochemical data, and pumice density measurements for the Sacarosa tephra-fall deposit, Misti volcano, southern Peru
Isopach, lithic isopleth, and pyroxene, Fe-Ti oxide, and plagioclase geochemistry data for the Orange Tuff, West Java, Indonesia Isopach, lithic isopleth, and pyroxene, Fe-Ti oxide, and plagioclase geochemistry data for the Orange Tuff, West Java, Indonesia
Science and Products
The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes The Khonkho tephra: A large-magnitude volcanic eruption coincided with the rise of Tiwanaku in the Andes
To mix or not to mix: Details of magma storage, recharge, and remobilization during the Pacheco stage at Misti Volcano, Peru (≤21–2 ka) To mix or not to mix: Details of magma storage, recharge, and remobilization during the Pacheco stage at Misti Volcano, Peru (≤21–2 ka)
The late Pleistocene Sacarosa tephra-fall deposit, Misti Volcano, Arequipa, Peru: Its magma, eruption, and implications for past and future activity The late Pleistocene Sacarosa tephra-fall deposit, Misti Volcano, Arequipa, Peru: Its magma, eruption, and implications for past and future activity
Estratigrafía preliminar del flanco Este del volcán de Santa Ana Estratigrafía preliminar del flanco Este del volcán de Santa Ana
Nuevos datos: Avalancha de escombros de Acajutla, volcán Santa Ana Nuevos datos: Avalancha de escombros de Acajutla, volcán Santa Ana
Azorella compacta's long-term growth rate, longevity, and potential for dating geomorphological and archaeological features in the arid southern Peruvian Andes Azorella compacta's long-term growth rate, longevity, and potential for dating geomorphological and archaeological features in the arid southern Peruvian Andes
The Orange Tuff: A Late Pleistocene tephra-fall deposit emplaced by a VEI 5 silicic Plinian eruption in West Java, Indonesia The Orange Tuff: A Late Pleistocene tephra-fall deposit emplaced by a VEI 5 silicic Plinian eruption in West Java, Indonesia
Geologic field-trip guide of volcaniclastic sediments from snow- and ice-capped volcanoes—Mount St. Helens, Washington, and Mount Hood, Oregon Geologic field-trip guide of volcaniclastic sediments from snow- and ice-capped volcanoes—Mount St. Helens, Washington, and Mount Hood, Oregon
Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields
Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields Bibliography of literature pertaining to Long Valley Caldera and associated volcanic fields
40Ar/39Ar dating of the eruptive history of Mount Erebus, Antarctica: Summit flows, tephra, and caldera collapse 40Ar/39Ar dating of the eruptive history of Mount Erebus, Antarctica: Summit flows, tephra, and caldera collapse
Bibliography of literature from 1990-1997 pertaining to Holocene and fumarolic Pleistocene volcanoes of Alaska, Canada, and the conterminous United States Bibliography of literature from 1990-1997 pertaining to Holocene and fumarolic Pleistocene volcanoes of Alaska, Canada, and the conterminous United States
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.