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1. (2014) Axial Seamount Eastern Caldera (RS03ECAL)

   https://doi.org/10.58046/ooi-rs03ecal  

   NSF_Ocean_Observatories_Initiative (January 2014, US NSF Ocean Observatories Initiative)

   The Eastern Caldera Medium-Power Junction Box (MJ03E) supports geophysical instruments in the Eastern side of the 3-km-across caldera at the summit of Axial Seamount, at a water depth of ~1,520 meters. The instruments are designed to measure local seismic events associated with migration of melt and volatiles within the volcano, as well as far-field seismic events. They also measure uplift and deflation of the seafloor associated with ingress of melt within the underlying magma chamber, and collapse of the seafloor during diking-eruptive events. This site was chosen because Axial has erupted in 1988, 2011, and again in 2015. During the 2015 event, over 8,000 earthquakes were measured with the cabled geophysical array, and data were streamed live back to shore in real-time. A 635 meter-long electro-optical cable from Primary Node PN03B provides the junction box with significant power (375 V) and bandwidth (1 Gbs) to operate the instruments and transmit data to shore. 

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2. (2014) Axial Seamount Central Caldera (RS03CCAL)

   https://doi.org/10.58046/ooi-rs03ccal  

   NSF_Ocean_Observatories_Initiative (January 2014, US NSF Ocean Observatories Initiative)

   The Central Caldera Medium-Power Junction Box (MJ03F) supports geophysical instruments in the north central portion of the Axial Seamount caldera at a water depth of ~1,530 meters. The instruments are designed to measure local seismic events associated with migration of melt and volatiles within the volcano, as well as far-field seismic events. They also measure uplift and deflation of the seafloor associated with ingress of melt within the underlying magma chamber, and collapse of the seafloor during diking-eruptive events. This site was chosen because Axial has erupted in 1988, 2011, and again in 2015. During the 2015 event, over 8,000 earthquakes were measured with the cabled geophysical array, and data were streamed live back to shore in real-time. A ~4.7 km-long electro-optical cable from Primary Node PN03B provides the junction box with significant power (375 V) and bandwidth (1 Gbs) to operate the instruments and transmit data to shore. 

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3. Magma accumulation at depths of prior rhyolite storage beneath Yellowstone Caldera

   https://doi.org/10.1126/science.ade0347  

   Maguire, Ross; Schmandt, Brandon; Li, Jiaqi; Jiang, Chengxin; Li, Guoliang; Wilgus, Justin; Chen, Min (December 2022, Science)

   Seismic imaging shows a melt fraction of up to 20% in the depth range that supplied prior Yellowstone eruptions. 

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4. The Role of Tectonic Stress in Triggering Large Silicic Caldera Eruptions

   https://doi.org/10.1029/2018GL077393  

   Cabaniss, Haley E.; Gregg, Patricia M.; Grosfils, Eric B. (May 2018, Geophysical Research Letters)
5. Shear Velocity Evidence of Upper Crustal Magma Storage Beneath Valles Caldera

   https://doi.org/10.1029/2022GL101520  

   Wilgus, Justin; Schmandt, Brandon; Maguire, Ross; Jiang, Chengxin; Chaput, Julien (March 2023, Geophysical Research Letters)