As I’ve added more features to mloc over the years its memory requirements have grown to the point where we are now encountering problems on some systems when trying to run larger clusters. I won’t try to describe the details here but I’m happy to discuss it with you if you get in touch. In the old days it was referred to as “stack overflow” but modern chips and OSes have much more complex memory management systems and I don’t really know what is specifically failing. The original software structure, written in the 1980s is based mainly on Fortran 77 and relies heavily on include files and named common blocks that hit the stack very hard. The good news is that Fortran 90 (which is the standard used for mloc) has some features that should make it possible to substantially reduce the memory requirements for a given problem size, and thus make it feasible to run clusters with more events and/or arrival time data. I am now working on the next generation of the code that takes advantage of some of those features, in particular, modules and allocatable arrays. The reorganization should also make it easier to maintain and develop the code further. So for some period of time I will not be working on new calibrated clusters (much). I will post here when I have a version ready for testing.
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Salem cluster posted
The Salem cluster in northwest Oregon has been posted in the “mloc data for GCCEL” section.
Seattle cluster posted
A calibrated cluster in the Seattle, Washington area has been posted to GCCEL.
New distribution of mloc
The distribution package for mloc v10.6.6, release date April 18, 2024, is now available on the Distribution page.
Nabesna and Uwajima new clusters, Califon updated
New calibrated clusters in Alaska (Nabesna) and Japan (Uwajima) have been uploaded, plus an update to the Califon, New Jersey cluster with data from a temporary network.
Hualien cluster in GCCEL
A calibrated cluster based on the recent Hualien 7.4 Mw sequence on the northeastern coast of Taiwan has been uploaded to the “mloc data for GCCEL” section.
Califon, New Jersey cluster
The cluster is based on the 4.8 Mw earthquake that shook New York earlier today. The rest of the cluster consists of small events, mostly less than magnitude 3 and observed only within about 700 km.
Antofagasta cluster
I uploaded the Antofagasta cluster, named after Antofagasta, Chile. It includes the Mw 7.7 “Tocopilla” earthquake on November 14, 2007.
Updated Haiti cluster
I updated the Port au Prince cluster to include more recent events, particularly the August 14, 2021 7.4 Ms earthquake.
New and updated clusters
The Fin-Tiab cluster in southern Iran has been updated and three new clusters in the U.S. have been uploaded: Falls City, Texas, Smith’s Ferry, Idaho, and Dillon, Montana.