Auto Scaling replacement of instances terminated in EC2 console

asg_console_termination

$ aws autoscaling describe-scaling-activities --auto-scaling-group-name web-asg --query 'Activities[*].{Description:Description,StartTime:StartTime,Cause:Cause}'
[
    {
        "Cause": "At 2015-06-16T14:59:31Z an instance was started in response to a difference between desired and actual capacity, increasing the capacity from 2 to 3.", 
        "Description": "Launching a new EC2 instance: i-751c4edf", 
        "StartTime": "2015-06-16T14:59:32.927Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:59:01Z an instance was taken out of service in response to a EC2 health check indicating it has been terminated or stopped.", 
        "Description": "Terminating EC2 instance: i-74194bde", 
        "StartTime": "2015-06-16T14:59:01.757Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:57:31Z an instance was started in response to a difference between desired and actual capacity, increasing the capacity from 2 to 3.", 
        "Description": "Launching a new EC2 instance: i-b8ee1641", 
        "StartTime": "2015-06-16T14:57:33.033Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:57:01Z an instance was taken out of service in response to a EC2 health check indicating it has been terminated or stopped.", 
        "Description": "Terminating EC2 instance: i-3deb13c4", 
        "StartTime": "2015-06-16T14:57:01.157Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:55:30Z an instance was started in response to a difference between desired and actual capacity, increasing the capacity from 2 to 3.", 
        "Description": "Launching a new EC2 instance: i-6d4ff8c7", 
        "StartTime": "2015-06-16T14:55:32.323Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:55:00Z an instance was taken out of service in response to a EC2 health check indicating it has been terminated or stopped.", 
        "Description": "Terminating EC2 instance: i-7941f6d3", 
        "StartTime": "2015-06-16T14:55:00.387Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:52:25Z a user request created an AutoScalingGroup changing the desired capacity from 0 to 3.  At 2015-06-16T14:52:29Z an instance was started in response to a difference between desired and actual capacity, increasing the capacity from 0 to 3.", 
        "Description": "Launching a new EC2 instance: i-7941f6d3", 
        "StartTime": "2015-06-16T14:52:31.016Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:52:25Z a user request created an AutoScalingGroup changing the desired capacity from 0 to 3.  At 2015-06-16T14:52:29Z an instance was started in response to a difference between desired and actual capacity, increasing the capacity from 0 to 3.", 
        "Description": "Launching a new EC2 instance: i-3deb13c4", 
        "StartTime": "2015-06-16T14:52:30.751Z"
    }, 
    {
        "Cause": "At 2015-06-16T14:52:25Z a user request created an AutoScalingGroup changing the desired capacity from 0 to 3.  At 2015-06-16T14:52:29Z an instance was started in response to a difference between desired and actual capacity, increasing the capacity from 0 to 3.", 
        "Description": "Launching a new EC2 instance: i-74194bde", 
        "StartTime": "2015-06-16T14:52:30.721Z"
    }
]