Hawaii: Earthquakes, Structure, and Volcanism Sarah Shapiro.

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Hawaii: Earthquakes, Structure and Volcanism

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Presentation transcript:

Hawaii: Earthquakes, Structure, and Volcanism Sarah Shapiro

Background: Plate Tectonics

Hot Spots of the World

Hot Spot Track

Pacific Hot Spot Tracks

Hawaii: What a load…

Lithospheric Flexure Watts and Zhong, 2000

Seismicity of Hawaii ( )

Volcanic Earthquakes USGS: Volcanic earthquakes “Tornillos” Swarms (new fractures are forming) Volcanic Tremor – low freq. vibrations (due to moving magma)

Magma Plumbing from Microearthquakes Ryan et al., 1981

Surface Geology

So why am I talking about all of this?

My Research: GPR

Equipment  We used a Sensors and Software Pulse Ekko 100, which was equipped with 50, 100, and 200 MHz antennae  Targets included:  beach sands  nearshore lava flows  well-developed soil covers  lava tubes  major fault zones

GPR Basics: Acquisition  GPR surveys on the Big Island of Hawaii, in conjunction with SES Semester in Hawaii program Reflection Mode Common Mid Point

GPR Basics: Penetration Increasing Penetration Increasing Conductivity

Why does this matter?

The Hilana Fault Issue Cannon and Burgmann, 2001

Models of Hilina Fault Geometry Cannon et al., 2001

Morgan et al, 2000 Models of Hilina Fault Geometry

Tsunami Potential

GPS Measured Motion Courtesy J. Kauahekaua

Pali Uli

Groundwater

3D Lava Stratigraphy

Lava Tubes Known lava tubes GPR surveys above known lava tubes

Sampling lava flows

I cant complain!

In conclusion....