Post Eruption inflation of the East Pacific Rise at 9°50′ N

Seismogenic structure and processes associated with magma inflation and hydrothermal circulation beneath the East Pacific Rise at 9°50′N

[1] A dense ocean bottom seismometer array recorded more than 7,300 microearthquakes between October 2003 and April 2004 on the fast spreading East Pacific Rise at 9°50′ N. A previous initial analysis of these data revealed the general structure of an along‐axis oriented hydrothermal circulation cell, with an inferred down‐flow zone near a 4th‐order axial discontinuity, a horizontal band of sei...

Seismic heterogeneity in the upper crust eruption site on the East Pacific Rise , 9 ø 50 ' N near the 1991

We report the results of a small-aperture uppercrustal tomography experiment conducted on the East Pacific Rise near 9ø50'N, the site of a volcanic eruption in 1991. The experiment geometry comprised 3 ocean bottom seismometers and 491 airgun shots fired in a 16 x 16 km 2 area. Twoand three-dimensional inversions indicate that the average upper crustal velocities, both on and off axis, increase...

Broadband marine MT exploration of the East Pacific Rise at 9 50 0 N

[1] We present the first use at a mid-ocean ridge of a recently developed broadband marine magnetotelluric (MT) instrument. The extended high frequency performance of the instrument allows resolution of electrical resistivity structure at shallower depths than traditional marine MT sensors. Our two-dimensional inversion model from data collected at four MT sites on the East Pacific Rise (EPR) a...

Rapid ascent and emplacement of basaltic lava during the 2005–06 eruption of the East Pacific Rise at ca. 9°51′N as inferred from CO2 contents

Persistent effects of disturbance on larval patterns in the plankton after an eruption on the East Pacific Rise

To predict how benthic communities will respond to disturbance, it is necessary to understand how disturbance affects the planktonic larval supply available to recolonize the area. Deep-sea hydrothermal vent fauna along the East Pacific Rise (EPR) experience frequent local extinctions due to tectonic and magmatic events, but the effects on regional larval abundance and diversity are unknown. We...