Update 2

Routine update release. 190 commits since last release.

Update 1

General improvements following the initial release based on testing deployment on development servers and atlas events. This is the initial release that we are using for deployment on production servers.

Release

This version of ShakeMap is a complete update and refactoring of the previous version of ShakeMap (known as v3.5). The major new features of v4.0 are outlined below:

• The code base has been rewritten in the Python 3 programming language (v3.5 was largely in Perl). As part of that process, the source code control was changed from Subversion to Git and maintained on GitHub (https://github.com/usgs/shakemap). The new development environment includes continuous integration testing, and we have a current code coverage of approximately 93%.
• The interpolation scheme at the heart of ShakeMap was updated to use the conditional multivariate normal distribution, as described in Worden, et al. (2018).
• The ground motion prediction equations (GMPEs) used by ShakeMap are now drawn from the extensive and well-tested set provided by the HazardLib module of the OpenQuake software produced by the Global Earthquake Model (GEM) project (https://www.globalquakemodel.org/).
• The event bias is now computed using current best practices consistent with GMPE development (mixed-effects regression).
• v4.0 supports new distance measures required by some modern GMPEs (such as Rx and RY0).
• ShakeMap can now employ a weighted combination of GMPEs.
• v4.0 uses new point-source distance approximations based on Thompson and Worden (2017).
• The overall propagation of errors is more consistently handled and more formally correct.
• v4.0 is easily configured to support an arbitrary number of output spectral periods, and can support new ground motion parameters (e.g., duration, Arias Intensity).
• v4.0 allows the operator to compute ground motions for a set of pre-defined points, rather than a uniform grid. This feature enables outside operators and organizations to customize ShakeMap for a set of facilities.
• The automatic queueing system was redesigned to be more system agnostic, allowing its incorporation into diverse seismic network workflows.
• v4.0 includes a redesigned specification of the earthquake rupture to be more flexible, and outputs the rupture as a GeoJSON file which will facilitate its integration into the USGS Earthquake web site.
• The “select” module (formerly called “zoneconfig”) has been updated to support geographic regionalization required by some new GMPEs, and provides support for a smooth transitioning between regions.
• A redesigned output format (HDF) that incorporates all of the output grids, input data and configuration parameters, and metadata into a single file. This file will support alternative workflows, and possible future integration into web services.
• The installation process has been greatly simplified and can be carried out by an unprivileged user.
• Configuration is simpler and more intuitive.
• The documentation has been completely rewritten and is available online at http://usgs.github.io/shakemap/. The documentation includes a set of verification examples that can be reviewed and reproduced by the end user.

Eric M. Thompson, C. Bruce Worden (2017); Estimating Rupture Distances without a Rupture. Bull. Seism. Soc. Am. 108 (1): 371–379. doi: https://doi.org/10.1785/0120170174

Worden, C.B., E.M. Thompson, J.W. Baker, B.A. Bradley, N. Luco, and D.J. Wald (2018). Spatial and Spectral Interpolation of Ground Motion Intensity Measure Observations, Bull. Seism. Soc. Am. 108(2): 866-875. doi: https://doi.org/10.1785/0120170201

RC3

Merge pull request #710 from cbworden/cancel_origins

Cancel origins

RC2

Merge pull request #702 from cbworden/select

Changed name of model_zc.conf to model_select.conf; added comment to top

RC1

Release Candidate to conform to USGS software release policy.

Pre release

Merge pull request #621 from cbworden/grid_test

Coremod tests

Test tagging 0.6

Merge pull request #204 from cbworden/tag_test

Updated readme.