# Determine whether Amazon EC2 terminated a Spot Instance


A Spot Instance runs until Amazon EC2 terminates it in response to a Spot Instance interruption, or until you terminate it yourself. For more information, see [Behavior of Spot Instance interruptions](interruption-behavior.md).

After a Spot Instance is terminated, you can use AWS CloudTrail to see whether Amazon EC2 terminated it. If the CloudTrail log includes a `BidEvictedEvent`, this indicates that Amazon EC2 terminated the Spot Instance. If instead you see a `TerminateInstances` event, this indicates that a user terminated the Spot Instance.

Alternatively, if you want to receive notification that Amazon EC2 is going to interrupt your Spot Instance, use Amazon EventBridge to respond to the [EC2 Spot Instance Interruption Warning event](spot-instance-termination-notices.md#ec2-spot-instance-interruption-warning-event).

**To view BidEvictedEvent events in CloudTrail**

1. Open the CloudTrail console at [https://console.aws.amazon.com/cloudtrail/](https://console.aws.amazon.com/cloudtrail/).

1. In the navigation pane, choose **Event history**.

1. From the list of filters, choose **Event name**, and then in the filter field to the right, enter **BidEvictedEvent**.

1. (Optional) Select a time range.

1. If the list is not empty, choose **BidEvictedEvent** from the resulting entry to open its details page. You can find information about the Spot Instance in the **Event record** pane, including the ID of the Spot Instance. The following is an example of the event record.

   ```
   {
       "eventVersion": "1.05",
       "userIdentity": {
           "accountId": "123456789012",
           "invokedBy": "ec2.amazonaws.com"
       },
       "eventTime": "2016-08-16T22:30:00Z",
       "eventSource": "ec2.amazonaws.com",
       "userAgent": "ec2.amazonaws.com",
       "sourceIPAddress": "ec2.amazonaws.com",
       "eventName": "BidEvictedEvent",
       "awsRegion": "us-east-2",
       "eventID": "d27a6096-807b-4bd0-8c20-a33a83375054",
       "eventType": "AwsServiceEvent",
       "recipientAccountId": "123456789012",
       "RequestParameters": null,
       "ResponseElements": null,
       "serviceEventDetails": {
           "instanceIdSet": [
             "i-1eb2ac8eEXAMPLE"
           ]
       }
   }
   ```

1. If you did not find an entry for the `BidEvictedEvent` event, enter **TerminateInstances** as the event name. For more information about the event record for `TerminateInstances`, see [Amazon EC2 API event examples](monitor-with-cloudtrail.md#cloudtrail-event-examples).