---
pretty_name: GEMS-3D Tiny
license: cc-by-nc-sa-4.0
language:
- en
tags:
- geophysics
- synthetic-data
- 3d
- multiphysics
- seismic
- gravity
- magnetic
- magnetotelluric
size_categories:
- n<1K
---

# GEMS-3D Tiny

This tiny release is a compact paired subset of GEMS-3D model bundles and forward-response bundles.

- Train split: `models/train`, 15 paired samples selected from source `train-river`.
- Test split: `models/tests`, 1 paired sample selected from source `tests-river` at approximately the same source retention ratio.
- Forward responses: `forward/train` and `forward/tests`, 16 paired `forward_bundle.npz` files included.
- Total selected payload: 19.61 GiB.
- Selection seed: `20260505`.

The train split covers all anomaly families.

Directory convention:

```text
models/<split>/<topology>/<background_id>/<anomaly_family>/model_bundle.npz
forward/<split>/<topology>/<background_id>/<anomaly_family>/forward_bundle.npz
```

See `metadata/tiny_summary.json`, `metadata/manifest_models_tiny.jsonl`, and `metadata/manifest_forward_tiny.jsonl` for exact sample lists.