January 2026 monthly summary for GEMScienceTools/oq-mbtk focused on expanding fault rupture configurability, connectivity-based rupture grouping, and flexible full-fault rupture options, complemented by maintenance and test improvements to bolster reliability and validation. These efforts enhance modeling fidelity, reduce manual configuration, and support more accurate seismic event analysis and decision-making for hazard assessment.

December 2025 monthly summary for GEMScienceTools/oq-mbtk. Focused on performance optimization for rupture data handling, reliability improvements in data structures and plausibility modeling, and strengthened testing/CI. Delivered features and stability that directly enhance data processing speed, model fidelity, and deployment confidence for rupture network analytics.

Month: 2025-11 — Monthly summary for GEMScienceTools/oq-mbtk focusing on delivered features, reliability improvements, and overall impact. No explicit major bug-fix commits were recorded in this period; the work centered on performance, scalability, and test coverage to enable faster, more reliable rupture modeling and inversion utilities.

October 2025: Delivered new data-modeling and data-IO capabilities across gem/oq-engine and GEMScienceTools/oq-mbtk, focusing on flexibility, portability, and reliability. Key features include a from_moment constructor for TaperedGRMFD to generate distributions from a target moment rate, CSV plotting support for oq-mbtk, and API refinements for completeness calculation with improved tests and data handling. A targeted bug fix removed duplicated return items in read_comp_data. These changes reduce modeling turnaround time, broaden data source compatibility (CSV/PKL), and improve data precision and test coverage, strengthening the end-to-end hazard calculation workflow.

September 2025: Delivered significant enhancements focused on data fidelity and robustness across two repositories, with clear business value for downstream analysis and risk assessment. Key features delivered include per-fault subfault output for multifault sources and a new geometric utility with robust tests for edge cases.

August 2025 performance summary for GEMScienceTools/oq-mbtk: Delivered Geospatial Fault Data Export and Subdivision Tooling, enabling GeoJSON export of individual faults and fault collections and subdivision of KiteSurface fault geometries for granular rupture analysis. Commits: d49e802896b2cfe97f3b17e052bfdc1be18e9787 (export to geojson); 991f2a4597eaab2f0401491ce857b5bb278aaba0 (updated code for subduction). No major bugs fixed this month. Impact: enhanced interoperability with GIS tools, improved modeling fidelity for subduction zone analyses, and a foundation for scalable fault data workflows. Skills: geospatial data handling, GeoJSON serialization, mesh subdivision, Python code quality and maintainability.

July 2025: Delivered two major features in GEMScienceTools/oq-mbtk focused on data clarity and scalable analysis. Enhanced Slip Rate Visualization: clearer labels for fault slip rate and modeled ruptures, with refined error bars (commit 8971c1585224df038404b4c235c3e4500cfa9c9b). NNLS Solver and Parallel Multifault Graph Processing: introduced NNLS solver and a parallel workflow for finding connected subsets with group constraints to boost performance (commit 018ad3716e02badd39818a8766578d5951db0c30). No major bugs reported. Impact: improved data interpretability and faster, scalable numerical analysis for fault mechanics; support for decision-making with clearer visuals and more efficient analytics. Technologies/skills demonstrated: Python, data visualization, NNLS, parallel processing, graph algorithms, and robust version control.

June 2025 monthly summary for GEMScienceTools/oq-mbtk focusing on delivering robust enhancements to the Plausibility and Inversion Modules. Implemented CSR-based similarity matrix construction, residual calculations, and improved solver robustness with stall detection and better handling of underdetermined systems. Logging was refined to improve observability and troubleshooting across the pipeline. These changes increase solution reliability, numerical stability, and operational visibility, enabling more accurate plausibility assessments and faster issue resolution.

May 2025 summary: OpenQuake rupture modeling and inversion performance improvements were delivered in GEMScienceTools/oq-mbtk, focusing on accuracy, speed, and scalability. The work consolidated enhancements to rupture grouping, enumeration, plausibility graphs, and performance-optimized solvers, including a NNLS solver and matrix-vector optimizations, complemented by refactors of parallel processing and rupture rate calculations to improve throughput for large-scale simulations. Overall, the month emphasized robust modeling fidelity and faster scenario analysis, enabling more informed seismic hazard assessments.

April 2025 Monthly Summary: Focused on robustness, performance, and modeling capabilities across gem/oq-engine and GEMScienceTools/oq-mbtk. Key features delivered include the introduction of an earthquake fault likelihood model and rupture analysis performance enhancements. Major bugs fixed address completeness analysis robustness when data are incomplete. Overall impact centers on more reliable data processing pipelines, faster graph-based analyses, and improved risk assessment readiness. Technologies demonstrated include Python, JIT acceleration with Numba, CSR matrices for scalable graph processing, API parameter design for robust failure modes, and cross-repo collaboration to enhance modeling reliability.

OpenQuake fault modeling and distributed seismicity enhancements delivered in GEMScienceTools/oq-mbtk. Implemented the ability to skip specific faults during network construction, refined rake angle calculations, improved metadata tracking for the system of equations, and extended distributed seismicity controls with variable buffer distances and magnitude thresholds around faults to enable more nuanced modeling. The work was completed as a major feature merge (commit 57d8e32a8faaa6628c9574ca165f69e3fae35606).

Monthly work summary for 2025-01 focusing on delivered features and bug fixes across two repositories (GEMScienceTools/oq-mbtk and gem/oq-engine). Highlights include engineering improvements to visualization, performance optimizations for fault-network analyses, and robust edge-case bug fixes with improved logging. Business impact: faster analyses, more reliable uncertainty visualization, and reduced debugging overhead.

December 2024 monthly summary for GEMScienceTools/oq-mbtk: Focused on delivering reproducibility and accuracy improvements in fault-network modeling, with a targeted enhancement to the inversion workflow. Key changes were introduced to default fault-network settings and inversion handling to improve consistency and reliability of results used in risk assessment and decision-making. No explicit bugs fixed were reported this month; instead, the emphasis was on feature-level enhancements that raise the technical rigor of the modeling pipeline.

In November 2024, delivered a new tapered GRMFD calculation path for shape-only analysis in FERMI within oq-mbtk, introducing a corner_mag parameter to enable tapered rate calculations at a specified corner magnitude. Refactored core functions to support the new parameter, and added helper utilities for Pareto distribution and GR rate calculations. This work enhances GRMFD modeling capabilities and establishes groundwork for more robust seismic risk assessment in FERMI workflows.