Sheeted dike complexes, in which dike intrudes dike without intermediate screens of gabbro or pillow lava, have long been considered key features of oceanic lithosphere and ophiolites formed in extensional environments. The presence of a sheeted complex implies an approximate balance between spreading rate and magma supply, such that there is just enough melt to fill newly formed fractures prod...

In the year 2000, an anomalous sequence of off-fault seismicity was detected near Lake Pillsbury in northern California. The seismicity was interpreted by Hayes et al. (2005, 2006) to be associated with a dike injection. I completed a gravity survey over the location of the seismicity and used that data in gravity modeling, to test the hypothesis that the seismicity was directly linked to the i...

Figure 1. Relief map of island of Hawaii (after Moore et al., 1995) showing locations of dive sites (triangles, except dive 389, which is a square), locations of shield volcanoes (L—Loihi, K—Kilauea, ML— Mauna Loa, H—Hualalai, MK—Mauna Kea, Ko—Kohala), areas of recent Kilauea eruptions along south coast of Hawaii (u—Mauna Ulu, p—Puu Oo), rift zones of Mauna Loa (parallel lines), large, ca. 100 ...

Introduction: Lunar pyroclastic deposits can be subdivided into several modes of occurrence [1], suggesting different modes of emplacement. For example, some smaller pyroclastic deposits have been interpreted to have erupted during strombolian/hawaiian activity [2], while others are linked to vulcanian activity related to dike and sill emplacement below crater floors [3,4]. The largest pyroclas...

The paper describes concept and implementation details of integrating a finite element module for dike stability analysis “Virtual Dike” into an early warning system for flood protection. The module operates in real-time mode and includes fluid and structural submodels for simulation of porous flow through the dike and for dike stability analysis. Realtime measurements obtained from pore pressu...