diff --git a/pygmt/datasets/earth_age.py b/pygmt/datasets/earth_age.py
index 8fe3c5f4d66..a13f22179b8 100644
--- a/pygmt/datasets/earth_age.py
+++ b/pygmt/datasets/earth_age.py
@@ -15,7 +15,7 @@ def load_earth_age(resolution="01d", region=None, registration=None):
     r"""
     Load the Earth seafloor crustal age dataset in various resolutions.
 
-    .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_age.png
+    .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_age.jpg
        :width: 80 %
        :align: center
 
diff --git a/pygmt/datasets/earth_magnetic_anomaly.py b/pygmt/datasets/earth_magnetic_anomaly.py
index 1e937cb5aff..8041cbb4b04 100644
--- a/pygmt/datasets/earth_magnetic_anomaly.py
+++ b/pygmt/datasets/earth_magnetic_anomaly.py
@@ -24,7 +24,7 @@ def load_earth_magnetic_anomaly(
 
        * - Earth Magnetic Anomaly Model (EMAG2)
          - World Digital Magnetic Anomaly Map (WDMAM)
-       * - .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_mag4km.jpg
+       * - .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_mag.jpg
          - .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_wdmam.jpg
 
     The grids are downloaded to a user data directory
diff --git a/pygmt/datasets/earth_mask.py b/pygmt/datasets/earth_mask.py
index d0c5ca6daf6..827b3f41dc3 100644
--- a/pygmt/datasets/earth_mask.py
+++ b/pygmt/datasets/earth_mask.py
@@ -15,7 +15,7 @@ def load_earth_mask(resolution="01d", region=None, registration=None):
     r"""
     Load the GSHHG Earth Mask dataset in various resolutions.
 
-    .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_mask.png
+    .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_mask.jpg
        :width: 80 %
        :align: center
 
diff --git a/pygmt/datasets/earth_relief.py b/pygmt/datasets/earth_relief.py
index 84f7c36d94e..62b6bf8cb47 100644
--- a/pygmt/datasets/earth_relief.py
+++ b/pygmt/datasets/earth_relief.py
@@ -23,7 +23,7 @@ def load_earth_relief(
     Load the Earth relief datasets (topography and bathymetry) in various
     resolutions.
 
-    .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_gebcosi.jpg
+    .. figure:: https://www.generic-mapping-tools.org/remote-datasets/_images/GMT_earth_gebco.jpg
        :width: 80 %
        :align: center