@article {wang_slab_2025,
	title = {Slab Morphology, Dehydration, and Sub-Arc Melting Beneath the Alaska Peninsula Revealed by Body-Wave Tomography},
	journal = {Journal of Geophysical Research: Solid Earth},
	volume = {130},
	number = {3},
	year = {2025},
	note = {_eprint: https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2024JB029814},
	pages = {e2024JB029814},
	abstract = {Abstract The Alaska Peninsula has a long history of plate subduction with along-arc variations in volcanic eruption styles and geochemistry. However, the sub-arc melting processes that feed these volcanoes are unclear. The Alaska slab morphology below 200 km depth remains debated due to limited seismic data and thus low tomography resolution in this region. Here we utilize the newly available regional and teleseismic data to build 3-D high-resolution VP and VS models to 660 km depth. We find that the high-velocity Pacific Plate subducts to the bottom of the mantle transition zone (MTZ) with complex deformation and gaps. In the southwest, we observe a wide gap in the high-velocity slab at 200{\textendash}500 km depths. Toward the northeast, the slab becomes more continuous extending to the MTZ with a few holes below 200 km. We interpret these gaps as a slab tear that coincides with the subducted ancient Kula-Pacific Ridge. We also invert for 3-D VP and VP/VS models to 200 km depth with higher resolution and find strong along-strike changes in slab dehydration and sub-arc melting, indicated by low VP and high VP/VS anomalies. Slab dehydration and sub-arc melting are most extensive below the Pavlof and Shumagin segments in the southwest, becoming limited below the Chignik and Chirikof segments in the northeast, and extensive again beneath the Kodiak segment further to the northeast. We propose that the variations of slab hydration at the outer rise significantly influence slab dehydration at greater depths and further control sub-arc melting beneath the Alaska Peninsula.},
	keywords = {Alaska peninsula, Body-wave tomography, slab dehydration, slab morphology, sub-arc melting, subduction zones, tomography, volcano},
	doi = {https://doi.org/10.1029/2024JB029814},
	author = {Wang, Fan and Wei, S. Shawn and Ruppert, Natalia A. and Zhang, Haijiang and Wu, Jonny}
}
@article {konter_seafloor_2004,
	title = {Seafloor seismic monitoring of an active submarine volcano: Local seismicity at Vailulu{\textquoteright}u Seamount, Samoa},
	journal = {Geochemistry, Geophysics, Geosystems},
	volume = {5},
	number = {6},
	year = {2004},
	note = {_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2004GC000702},
	abstract = {We deployed five ocean bottom hydrophones (OBHs) for a 1-year seismic monitoring study of Vailulu{\textquoteright}u Seamount, the youngest and easternmost volcano in the Samoan Archipelago. Four instruments were placed on the summit crater rim at 600{\textendash}700 m water depth, and one was placed inside the crater at 1000 m water depth. An analysis of the first 45 days of records shows a very large number of seismic events, 211 of them local. These events define a steady background activity of about four seismic events per day, increasing to about 10 events per day during a week of heightened seismic activity, which peaked at 40 events during 1 day. We identified 107 earthquakes, whose arrivals could be picked on all five stations and that are likely located within the seamount, based on their similar waveforms. Two linear trends are defined by 21 of these events. These are extremely well correlated and located, first downward then upward on a steeply inclined plane that is close to the axial plane of the southeast rift as it emerges from the main summit of Vailulu{\textquoteright}u. These events resemble volcanotectonic earthquakes from subaerial volcanoes in displaying very coherent seismic waveforms and by showing systematic, narrowly defined progressions in hypocenter locations. We propose that these events reflect brittle rock failure due to magma redistribution in or near a central magma reservoir.},
	keywords = {Samoa, seismic monitoring, submarine, Vailulu{\textquoteright}u, volcanic activity, volcano},
	issn = {1525-2027},
	doi = {10.1029/2004GC000702},
	url = {https://onlinelibrary.wiley.com/doi/abs/10.1029/2004GC000702},
	author = {Konter, J. G. and Staudigel, H. and Hart, S. R. and Shearer, P. M.}
}
