We make inferences about the physical properties of heterogeneous media from scattered (elastic) waves. Indoors, these waves are mostly ultrasonic, excited and detected with lasers. Outside, probing waves are in the seismic frequency band.

Apple Seismology; for more info visit the publications page.

As our wavelengths span orders of magnitudes, so do our applications. Outside, targets include the Auckland Volcanic Field, geothermal exploration, and micro-seismicity for fluid reservoir characterization. In the laboratory, we do rock physics in collaboration with the PORO lab, ice physics, medical imaging.


  • Inverting teleseismic event with adaptive stacking
    getting the time residuals So far, ourĀ travel-time information for the tomographic inversion have been obtained from manually inspecting individual traces associated with the source and receiver pairs. Here we use another method of finding the arrival time residuals, by using the adaptive stacking method. This method make use of predicted times from anĀ earth model (eg.…
  • Chapter 2: Dimensional Analysis, Buckingham Pi Theorem, and the physics of flight
    Chapter 2 of A Guided Tour of Mathematical Methods for the Physical Sciences deals with dimensional analysis; a great way to test the accuracy of equations that describe physical laws. It also introduces the Buckingham Pi Theorem, allowing us -- under the right conditions -- to find the relationship between physical parameters based on such…
  • large scale real data tomography: teleseismic events only
    We perform the inversion using teleseismic events only for comparison. The stations and picks are identical to the data for teleseismic earthquake in this attempt. stations Eighteen stations are used, divided into 11 in central Auckland, and 7 surrounding the former array. Low resolution channels are removed. events There are 121 events considered, though 13…

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