diff --git a/src/server.ts b/src/server.ts
index 8be380c..4de11c9 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -50,16 +50,53 @@ export interface Context {
 const app = express();
 const httpServer = http.createServer(app);
 
-const server = new ApolloServer<Context>({
-  formatError: (formattedError, error: any) => {
-    if (error instanceof BaseError) {
-      console.error(formattedError.message);
+const formatError = (formattedError: any, error: any) => {
+  // Handle database errors (Sequelize BaseError).
+  if (error instanceof BaseError) {
+    console.error({
+      type: 'DatabaseError',
+      source: 'Sequelize',
+      message: formattedError.message,
+      internalMessage: error.message,
+      stack: error.stack,
+      path: formattedError.path,
+      extensions: formattedError.extensions,
+    });
 
-      return { message: 'Internal server error' };
-    }
+    return { message: 'Internal server error' };
+  }
 
-    return formattedError;
-  },
+  // Handle unexpected internal server errors.
+  if (
+    !formattedError.extensions?.code ||
+    formattedError.extensions.code === 'INTERNAL_SERVER_ERROR'
+  ) {
+    console.error({
+      type: 'InternalServerError',
+      source: 'Generic',
+      message: formattedError.message,
+      internalMessage: error.originalError?.message,
+      stack: error.originalError?.stack,
+      path: formattedError.path,
+      extensions: formattedError.extensions,
+    });
+
+    return { message: 'Internal server error' };
+  }
+
+  // Log and return other GraphQL errors as-is.
+  console.error({
+    type: 'GraphQLError',
+    message: formattedError.message,
+    path: formattedError.path,
+    extensions: formattedError.extensions,
+  });
+
+  return formattedError;
+};
+
+const server = new ApolloServer<Context>({
+  formatError,
   introspection: true,
   validationRules: [depthLimit(appSettings.maxQueryDepth)],
   typeDefs,