grond 1.4.0

A probabilistic earthquake source inversion framework. Designed and crafted in Mordor.

Grond is an open source software tool for robust characterization of earthquake sources. Moment tensors and finite fault rupture models can be estimated from a combination of seismic waveforms, waveform attributes and geodetic observations like InSAR and GNSS. It helps you to investigate diverse magmatic, tectonic, and other geophysical processes at all scales.

It delivers meaningful model uncertainties through a Bayesian bootstrap-based probabilistic joint inversion scheme. The optimisation explores the full model space and maps model parameter trade-offs with a flexible design of objective functions.

Rapid forward modelling is enabled by using pre-computed Green’s function databases, handled through the Pyrocko software library. They serve synthetic near-field surface displacements and synthetic seismic waveforms for arbitrary earthquake source models and geometries.

Installation with pip

See also: Grond Manual: Installation

Grond and all its dependencies can be installed by running

pip install grond

but, we recommend to make a conscious decision about how its main dependency Pyrocko and especially Pyrocko’s own dependencies are installed. The Pyrocko Installation Manual describes different installation schemes.

As a general advice, we recommend to exclusively use either, (1) the system’s native package manager, (2) Anaconda, or (3) pip only. In (1) and (2), only resort to use pip for those few packages which are not available as native packages. It is easy to prove that using multiple package managers on one system leads to non-deterministic behaviour!

To prevent pip from automatically resolving dependencies run

pip install --no-deps grond

This assumes that Pyrocko and Kite have been installed beforehand.

Documentation

Documentation and examples can be found in the Grond Manual.

Community

Meet people from all over the world doing awesome research with Grond in our community chat: use the Grond channel in the friendly Pyrocko Hive. This is the best place to talk about new features, special techniques or to get help on setting up your first inversion with Grond.

Development

Grond is open source.

Join us at our Git repository and read the Contribution guide.

– The Grond Developers