diff --git a/activity/geomip.json b/activity/geomip.json
index f1ba1d48e..68f6f9c13 100644
--- a/activity/geomip.json
+++ b/activity/geomip.json
@@ -1,10 +1,7 @@
 {
     "@context": "000_context.jsonld",
-    "type": "activity",
     "id": "geomip",
-    "name": "GeoMIP",
-    "cmip_acronym": "GeoMIP",
-    "long_name": "Geoengineering Model Intercomparison Project",
-    "url": null,
+    "type": "activity",
+    "description": "Geoengineering model intercomparison project: exploration of the climate response to solar radiation manipulation.",
     "drs_name": "GeoMIP"
-}
\ No newline at end of file
+}
diff --git a/experiment/g7-1p5k-sai.json b/experiment/g7-1p5k-sai.json
index 07c3f3b33..b3a981f93 100644
--- a/experiment/g7-1p5k-sai.json
+++ b/experiment/g7-1p5k-sai.json
@@ -2,26 +2,17 @@
     "@context": "000_context.jsonld",
     "id": "g7-1p5k-sai",
     "type": "experiment",
-    "experiment_id": "G7-1p5K-SAI",
-    "activity_id": [
-        "geomip"
+    "description": "Stablisation of global-mean temperature at 1.5C by increasing stratospheric sulfur forcing to whatever level is required to achieve stable temperatures. The simulation generally branches from a scenario simulation at some point in the future.",
+    "drs_name": "G7-1p5K-SAI",
+    "activity": "geomip",
+    "additional_allowed_model_components": [
+        "aer",
+        "chem",
+        "bgc"
     ],
-    "additional_allowed_model_components": [],
-    "description": "Stratospheric aerosol injection to reduce warming to 1.5K \n Stratospheric aerosol injection to reduce warming to 1.5K above pre-industrial levels",
-    "end_year": null,
-    "experiment": "G7-1.5K-SAI",
-    "min_number_yrs_per_sim": null,
-    "parent_activity_id": [
-        "no parent"
+    "min_ensemble_size": 1,
+    "required_model_components": [
+        "aogcm"
     ],
-    "parent_experiment_id": [
-        "no parent"
-    ],
-    "required_model_components": [],
-    "start_year": null,
-    "sub_experiment_id": [
-        "none"
-    ],
-    "tier": 0,
-    "drs_name": "G7-1p5K-SAI"
-}
\ No newline at end of file
+    "tier": 1
+}
diff --git a/scripts/generate-experiments.py b/scripts/generate-experiments.py
index 4a4440457..b947c0b81 100644
--- a/scripts/generate-experiments.py
+++ b/scripts/generate-experiments.py
@@ -190,6 +190,14 @@ def initialise_activities(self) -> "Holder":
                 experiments=[],
                 urls=["https://doi.org/10.5194/gmd-18-4399-2025"],
             ),
+            ActivityProject(
+                id="geomip",
+                experiments=[],
+                urls=[
+                    "https://doi.org/10.5194/gmd-17-2583-2024",
+                    "https://doi.org/10.1175/BAMS-D-25-0191.1",
+                ],
+            ),
             ActivityProject(
                 id="pmip",
                 experiments=[],
@@ -971,6 +979,83 @@ def add_scenario_entries(self) -> "Holder":
 
         return self
 
+    def add_geomip_entries(self) -> "Holder":
+        for (
+            drs_name,
+            description_univ,
+            description_proj_to_format,
+            base_scenario,
+            start_year,
+        ) in (
+            (
+                "G7-1p5K-SAI",
+                (
+                    "Stablisation of global-mean temperature at 1.5C "
+                    "by increasing stratospheric sulfur forcing "
+                    "to whatever level is required to achieve stable temperatures. "
+                    "The simulation generally branches from a scenario simulation at some point in the future."
+                ),
+                (
+                    "Stablisation of global-mean temperature at 1.5C "
+                    "by increasing stratospheric sulfur forcing "
+                    "to whatever level is required to achieve stable temperatures "
+                    "after following the `{scenario}` scenario until 2035."
+                ),
+                "scen7-ml",
+                2035,
+            ),
+        ):
+            description_proj = description_proj_to_format.format(scenario=base_scenario)
+            start_timestamp = f"{start_year}-01-01"
+            for exp_proj in self.experiments_project:
+                if exp_proj.id == base_scenario:
+                    parent = exp_proj
+                    break
+            else:
+                raise AssertionError(base_scenario)
+
+            univ = ExperimentUniverse(
+                drs_name=drs_name,
+                description=description_univ,
+                activity="geomip",
+                additional_allowed_model_components=["aer", "chem", "bgc"],
+                # Defined in project
+                branch_information="dont_write",
+                end_timestamp="dont_write",
+                min_ensemble_size=1,
+                # Defined in project
+                min_number_yrs_per_sim="dont_write",
+                parent_activity="dont_write",
+                parent_experiment="dont_write",
+                parent_mip_era="dont_write",
+                required_model_components=["aogcm"],
+                # Defined in project
+                start_timestamp="dont_write",
+                tier=1,
+            )
+
+            self.experiments_universe.append(univ)
+
+            proj = ExperimentProject(
+                id=univ.drs_name.lower(),
+                description=description_proj,
+                branch_information=f"Branch from the `{base_scenario}` simulation at the start of {start_year}.",
+                activity=univ.activity,
+                start_timestamp=start_timestamp,
+                end_timestamp=None,
+                min_number_yrs_per_sim=50,
+                min_ensemble_size=1,
+                parent_activity=parent.activity,
+                parent_experiment=parent.id,
+                parent_mip_era="cmip7",
+                tier=1,
+            )
+            self.experiments_project.append(proj)
+
+            self.add_experiment_to_activity(proj)
+
+        return self
+
     def write_files(self, project_root: Path, universe_root: Path) -> None:
         for experiment_project in self.experiments_project:
             experiment_project.write_file(project_root)
@@ -1036,6 +1121,7 @@ def main():
     holder.add_damip_entries()
     holder.add_pmip_entries()
     holder.add_scenario_entries()
+    holder.add_geomip_entries()
 
     holder.write_files(project_root=project_root, universe_root=universe_root)