A5063613996- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Geological and Geophysical Studies
- Seismic Waves and Analysis
- Geomagnetism and Paleomagnetism Studies
- High-pressure geophysics and materials
- Geophysics and Gravity Measurements
- Landslides and related hazards
- Hydrology and Sediment Transport Processes
- Seismology and Earthquake Studies
- Pacific and Southeast Asian Studies
- Methane Hydrates and Related Phenomena
- Plant Water Relations and Carbon Dynamics
- Geology and Paleoclimatology Research
Simon Fraser University
2012-2020
Microgravity data were collected between 2002 and 2009 at the Three Sisters Volcanic Complex, Oregon, to investigate causes of an ongoing deformation event west South Sister volcano. different conceptual models have been proposed as causal mechanism for event: (1) hydraulic uplift due continual injection magma depth, (2) pressurization hydrothermal systems (3) viscoelastic response initial depth. The gravitational effect was modeled be 20 33 μ Gal center field with volumes based on previous...
Abstract We conducted total magnetic field and Bouguer gravity measurements to investigate the shallow structure beneath summit caldera of Kīlauea Volcano, Hawai'i. Two significant distinctive anomalies were identified within caldera. One is interpreted be associated with a long‐lived prehistoric eruptive center, Observatory vent, located ~1 km east Hawaiian Volcano Observatory. The second anomaly corresponds set fissures that strike northeast from Halema'uma'u Crater, suggesting this an...
In order to identify the origin of Mauna Loa volcano's Nīnole Hills, Bouguer gravity was used delineate density contrasts within edifice. Our survey identified two residual anomalies beneath Southwest Rift Zone (SWRZ) and Hills. The Hills anomaly is elongated, striking northeast, in inversions both merge at approximately −7 km above sea level. positive anomaly, modeled as a rock volume ~1200 km3 associated with old eruptive vents. Based on geologic geophysical data, we propose that under...
Geophysical and geological observations collected in 2007-2012 shed light on the mechanisms controlling style location of eruptions within Las Sierras-Masaya Caldera complex, Nicaragua. These results confirm a hypothesised ~3.5 km diameter structure with features compatible presence ring fracture (50-65°, inward-dipping bounding walls). A central block is bound by this defines an incipient nested caldera related to emptying magma chamber following last Plinian eruption (1.8 ka). The...