2010 Maule earthquake slip correlates with pre-seismic locking of Andean subduction zone.

The magnitude-8.8 Maule (Chile) earthquake of 27 February 2010 ruptured a segment of the Andean subduction zone megathrust that has been suspected to be of high seismic potential. It is the largest earthquake to rupture a mature seismic gap in a subduction zone that has been monitored with a dense space-geodetic network before the event.

Optical projection system design for photoresist exposure.

In the exposure of microcircuits, it is attractive to replace contact printing with projection printing to avoid direct contact between the silicon wafer and glass master. Since etched photoresists do not exhibit a gray scale, the conventional criteria of projection printing do not apply. In order to establish adequate criteria for projection printing onto photoresists, the imaging properties of diffraction-limited optics and the recording characteristics of photoresists are examined.