diff --git a/mod/quiz/classes/event/question_manually_graded.php b/mod/quiz/classes/event/question_manually_graded.php
new file mode 100644
index 00000000000..d6444dc922d
--- /dev/null
+++ b/mod/quiz/classes/event/question_manually_graded.php
@@ -0,0 +1,109 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Question manually graded event class.
+ *
+ * @property-read array $other {
+ *      Extra information about event.
+ *
+ *      - int quizid: the id of the quiz.
+ *      - int attemptid: the id of the attempt.
+ *      - int slot: the question number in the attempt.
+ * }
+ *
+ * @package    core
+ * @since      Moodle 2.7
+ * @copyright  2014 Mark Nelson <markn@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+namespace mod_quiz\event;
+
+defined('MOODLE_INTERNAL') || die();
+
+class question_manually_graded extends \core\event\base {
+
+    /**
+     * Init method.
+     */
+    protected function init() {
+        $this->data['objecttable'] = 'question';
+        $this->data['crud'] = 'c';
+        $this->data['edulevel'] = self::LEVEL_TEACHING;
+    }
+
+    /**
+     * Returns localised general event name.
+     *
+     * @return string
+     */
+    public static function get_name() {
+        return get_string('eventquestionmanuallygraded', 'mod_quiz');
+    }
+
+    /**
+     * Returns description of what happened.
+     *
+     * @return string
+     */
+    public function get_description() {
+        return 'A question with the id of ' . $this->objectid . ' was manually graded by a user with the id ' . $this->userid .
+            ' for the attempt with the id ' . $this->other['attemptid'];
+    }
+
+    /**
+     * Returns relevant URL.
+     *
+     * @return \moodle_url
+     */
+    public function get_url() {
+        return new \moodle_url('/mod/quiz/comment.php', array('attempt' => $this->other['attemptid'],
+            'slot' => $this->other['slot']));
+    }
+
+    /**
+     * Return the legacy event log data.
+     *
+     * @return array
+     */
+    protected function get_legacy_logdata() {
+        return array($this->courseid, 'quiz', 'manualgrade', 'comment.php?attempt=' . $this->other['attemptid'] .
+            '&slot=' . $this->other['slot'], $this->other['quizid'], $this->contextinstanceid);
+    }
+
+    /**
+     * Custom validation.
+     *
+     * @throws \coding_exception
+     * @return void
+     */
+    protected function validate_data() {
+        parent::validate_data();
+
+        if (!isset($this->other['quizid'])) {
+            throw new \coding_exception('The \'quizid\' must be set in other.');
+        }
+
+        if (!isset($this->other['attemptid'])) {
+            throw new \coding_exception('The \'attemptid\' must be set in other.');
+        }
+
+        if (!isset($this->other['slot'])) {
+            throw new \coding_exception('The \'slot\' must be set in other.');
+        }
+
+    }
+}
diff --git a/mod/quiz/comment.php b/mod/quiz/comment.php
index 754b88dcee9..c1961ab2a8d 100644
--- a/mod/quiz/comment.php
+++ b/mod/quiz/comment.php
@@ -42,11 +42,6 @@ if (!$attemptobj->is_finished()) {
 require_login($attemptobj->get_course(), false, $attemptobj->get_cm());
 $attemptobj->require_capability('mod/quiz:grade');
 
-// Log this action.
-add_to_log($attemptobj->get_courseid(), 'quiz', 'manualgrade', 'comment.php?attempt=' .
-        $attemptobj->get_attemptid() . '&slot=' . $slot,
-        $attemptobj->get_quizid(), $attemptobj->get_cmid());
-
 // Print the page header.
 $PAGE->set_pagelayout('popup');
 $PAGE->set_heading($attemptobj->get_course()->fullname);
@@ -74,6 +69,21 @@ if (data_submitted() && confirm_sesskey()) {
         $transaction = $DB->start_delegated_transaction();
         $attemptobj->process_submitted_actions(time());
         $transaction->allow_commit();
+
+        // Log this action.
+        $params = array(
+            'objectid' => $attemptobj->get_question_attempt($slot)->get_question()->id,
+            'courseid' => $attemptobj->get_courseid(),
+            'context' => context_module::instance($attemptobj->get_cmid()),
+            'other' => array(
+                'quizid' => $attemptobj->get_quizid(),
+                'attemptid' => $attemptobj->get_attemptid(),
+                'slot' => $slot
+            )
+        );
+        $event = \mod_quiz\event\question_manually_graded::create($params);
+        $event->trigger();
+
         echo $output->notification(get_string('changessaved'), 'notifysuccess');
         close_window(2, true);
         die;
diff --git a/mod/quiz/lang/en/quiz.php b/mod/quiz/lang/en/quiz.php
index 001ae8c82f5..54966da9fd0 100644
--- a/mod/quiz/lang/en/quiz.php
+++ b/mod/quiz/lang/en/quiz.php
@@ -313,6 +313,7 @@ $string['eventattemptviewed'] = 'Quiz attempt viewed';
 $string['eventeditpageviewed'] = 'Quiz edit page viewed';
 $string['eventoverridedeleted'] = 'Quiz override deleted';
 $string['eventoverrideupdated'] = 'Quiz override updated';
+$string['eventquestionmanuallygraded'] = 'Question manually graded';
 $string['eventquizattemptabandoned'] = 'Quiz attempt abandoned';
 $string['eventquizattempttimelimitexceeded'] = 'Quiz attempt time limit exceeded';
 $string['eventquizattemptstarted'] = 'Quiz attempt started';
diff --git a/mod/quiz/tests/events_test.php b/mod/quiz/tests/events_test.php
index c1138e2ae27..41fca91393e 100644
--- a/mod/quiz/tests/events_test.php
+++ b/mod/quiz/tests/events_test.php
@@ -610,4 +610,40 @@ class mod_quiz_events_testcase extends advanced_testcase {
         $this->assertEventLegacyLogData($expected, $event);
         $this->assertEventContextNotUsed($event);
     }
+
+    /**
+     * Test the question manually graded event.
+     *
+     * There is no external API for manually grading a question, so the unit test will simply
+     * create and trigger the event and ensure the event data is returned as expected.
+     */
+    public function test_question_manually_graded() {
+        list($quizobj, $quba, $attempt) = $this->prepare_quiz_data();
+
+        $params = array(
+            'objectid' => 1,
+            'courseid' => $quizobj->get_courseid(),
+            'context' => context_module::instance($quizobj->get_cmid()),
+            'other' => array(
+                'quizid' => $quizobj->get_quizid(),
+                'attemptid' => 2,
+                'slot' => 3
+            )
+        );
+        $event = \mod_quiz\event\question_manually_graded::create($params);
+
+        // Trigger and capture the event.
+        $sink = $this->redirectEvents();
+        $event->trigger();
+        $events = $sink->get_events();
+        $event = reset($events);
+
+        // Check that the event data is valid.
+        $this->assertInstanceOf('\mod_quiz\event\question_manually_graded', $event);
+        $this->assertEquals(context_module::instance($quizobj->get_cmid()), $event->get_context());
+        $expected = array($quizobj->get_courseid(), 'quiz', 'manualgrade', 'comment.php?attempt=2&slot=3',
+            $quizobj->get_quizid(), $quizobj->get_cmid());
+        $this->assertEventLegacyLogData($expected, $event);
+        $this->assertEventContextNotUsed($event);
+    }
 }