Denver center controller reported observing an aircraft that received a minimum IFR altitude alert a...

Narrative:

Aircraft X was flying level at 9000 ft. And I got an mia [minimum IFR altitude] alert so I told the aircraft to climb to 10000 ft. To clear the mia. I radioed him again right after to inform him I needed to vector him for some military airspace. He started to question it so I told him he would need a vector or he would need to be VFR and enter a military training complex at his own risk. I noticed that through this he was not climbing. I told him that I needed him to climb right now and that I would also need to vector him. He started to climb but had already entered the mia box of 9300 ft. The pilot sounded as if to be a foreigner and did not take the appropriate action as directed. He was confused and his delayed response is the reason for the loss of separation. I also should have caught the mia situation sooner.pilot needs to take action when given a clearance.

Original NASA ASRS Text

Title: Denver Center Controller reported observing an aircraft that received a Minimum IFR Altitude alert and climbed the aircraft but pilot was slow to respond.

Narrative: Aircraft X was flying level at 9000 ft. and I got an MIA [Minimum IFR Altitude] alert so I told the aircraft to climb to 10000 ft. to clear the MIA. I radioed him again right after to inform him I needed to vector him for some military airspace. He started to question it so I told him he would need a vector or he would need to be VFR and enter a military training complex at his own risk. I noticed that through this he was not climbing. I told him that I needed him to climb right now and that I would also need to vector him. He started to climb but had already entered the MIA box of 9300 ft. The pilot sounded as if to be a foreigner and did not take the appropriate action as directed. He was confused and his delayed response is the reason for the loss of separation. I also should have caught the MIA situation sooner.Pilot needs to take action when given a clearance.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1612592
Time
Date	201901
Local Time Of Day	1201-1800
Place
Locale Reference	ZDV.ARTCC
State Reference	CO
Aircraft 1
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 8
Events
Anomaly	Conflict Airborne Conflict Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Inflight Event / Encounter CFTT / CFIT

Denver center controller reported observing an aircraft that received a minimum IFR altitude alert and climbed the aircraft but pilot was slow to respond.