Active and Passive Source Imaging
During late 2007 through early of 2009, the MEVO group performed a large active (recording explosions) and passive (recording eruptions, seismic background noise, and other signals) experment, Tomo Erebus.
During the 2007-2008 field season, 23 intermediate-period seismometers were installed to collect date through the austral fall and winter, for the passive-source aspect of the experiment. One year later, 100 three-component short period stations were deployed to record 16 chemical blasts.
Instrumentation for this experiment and field support was provide by the IRIS PASSCAL Instrument Center at NM Tech. These data are expected to provide dramatic new insight into the internal structure of the volcano.
Rendering of Ross Island (left) and the summit region of Mount Erebus (right) showing sparse intermetiate period stations and shot locations of the Tomo Erebus project.
Summit rendering of Erebus Volcano showing dense summit short-period station deployment and shot locations (red). After Zandomeneghi et al., 2009.
Zandomeneghi, D., Kyle, P., Miller, P., Snelson, C., Aster, R., Seismic tomography of Erebus Volcano, Antarctica, EOS trans AGU, in press, 2009.
Maraj, S., Snelson, C., Kyle, Pl, Zandomeneghi, S., Knox, H., Aster, R., Miller, P., Kaip, G., Controlled- source seismic investigations of the crustal structure beneath Erebus volcano and Ross Island, Antarctica, Eos Trans. AGU, Fall Meet. Suppl., 2009.
Chaput, J., Knox, H., Aster, R., Kyle, P., Green’s function estimates from body-wave autocorrelations of Strombolian eruption coda at Erebus volcano: Evidence for temporally varying shallow magmatic structure, Eos Trans. AGU, Fall Meet. Suppl., 2009.