Merge branch 'main' into dependabot/github_actions/actions/checkout-6

Author: santisoler

.github/workflows/build.yml

@@ -21,7 +21,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup Node
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: '20'
 
@@ -32,17 +32,24 @@ jobs:
       - name: Print MyST version
         run: myst --version
 
-      - name: Build website as static HTML
+      - name: Build website as static HTML (for PR)
+        if: github.event_name == 'pull_request'
+        run: |
+          echo "Building MyST website without setting BASE_URL"
+          myst build --html
+
+      - name: Build website as static HTML (for deploy)
+        if: github.event_name != 'pull_request'
         run: |
           echo "Building MyST website using BASE_URL=" $BASE_URL
           myst build --html
         env:
           BASE_URL: /${{ github.event.repository.name }}
 
       # Store the website as a build artifact so we can deploy it later
+      # or preview the website in a PR.
       - name: Upload HTML website as an artifact
-        # Only if not a pull request
-        if: success() && github.event_name != 'pull_request'
+        if: success()
         uses: actions/upload-artifact@v4
         with:
           name: html-${{ github.sha }}

notebooks/03-gravity/inv_gravity_anomaly_3d.ipynb

@@ -383,6 +383,23 @@
     "The SimPEG [Data](xref:simpeg#simpeg.data.Data) class is required for inversion and connects the observed data, uncertainties and survey geometry."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "execution": {
+     "iopub.execute_input": "2025-06-02T16:23:34.738628Z",
+     "iopub.status.busy": "2025-06-02T16:23:34.738355Z",
+     "iopub.status.idle": "2025-06-02T16:23:34.744628Z",
+     "shell.execute_reply": "2025-06-02T16:23:34.743489Z",
+     "shell.execute_reply.started": "2025-06-02T16:23:34.738604Z"
+    }
+   },
+   "source": [
+    ":::{important}\n",
+    "SimPEG uses a right-handed xyz coordinate system in which the z axis points _upward_. When defining the `Data` object for a gravity inversion we must check that the `dobs` array contains the **upward** component of the gravity acceleration due to anomalous bodies.\n",
+    ":::"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 8,

notebooks/08-tdem/fwd_tdem_1d.ipynb

@@ -212,6 +212,7 @@
     "    tdem.sources.CircularLoop(\n",
     "        receiver_list=receiver_list,\n",
     "        location=source_location,\n",
+    "        orientation=source_orientation,\n",
     "        waveform=stepoff_waveform,\n",
     "        current=source_current,\n",
     "        radius=source_radius,\n",

notebooks/08-tdem/inv_tdem_1d.ipynb

@@ -297,6 +297,7 @@
     "    tdem.sources.CircularLoop(\n",
     "        receiver_list=receiver_list,\n",
     "        location=source_location,\n",
+    "        orientation=source_orientation,\n",
     "        waveform=waveform,\n",
     "        current=source_current,\n",
     "        radius=source_radius,\n",