Crj-900 captain reported the stick shaker activated in a seemingly spurious manner not justified by ...

Narrative:

During a visual approach between min manuevering and vref; the stick shaker activated momentarily. I asked the first officer to fly 'the green line' as I was uncertain what the heart of the problem was. This contributed to a potential long landing; so we went around. I double checked the aircraft weight and speeds and did not find a significant difference (2 kts). During the landing (in ground effect); we received the stick shaker momentarily again. When I looked at the airspeed we were thirty knots above the stall queue.I'm not certain what the root cause of this event is. While we were at or above speed we received the stick shaker only. I saw neither the continous ignition nor the stall warning either time. I would like feedback on this situation if possible. I have been concerned for a couple of years now...it seems that the green line has been at or above our told cards' reference speeds. Today it was approximately fifteen knots higher than vref. I feel like we are flying under speed.

Original NASA ASRS Text

Title: CRJ-900 Captain reported the stick shaker activated in a seemingly spurious manner not justified by the flown airspeeds.

Narrative: During a visual approach between MIN MANUEVERING and VREF; the stick shaker activated momentarily. I asked the First Officer to fly 'the green line' as I was uncertain what the heart of the problem was. This contributed to a potential long landing; so we went around. I double checked the aircraft weight and speeds and did not find a significant difference (2 kts). During the landing (in ground effect); we received the stick shaker momentarily again. When I looked at the airspeed we were thirty knots above the stall queue.I'm not certain what the root cause of this event is. While we were at or above speed we received the stick shaker only. I saw neither the CONTINOUS IGNITION nor the STALL WARNING either time. I would like feedback on this situation if possible. I have been concerned for a couple of years now...it seems that the green line has been at or above our TOLD cards' reference speeds. Today it was approximately fifteen knots higher than VREF. I feel like we are flying under speed.

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	1346137
Time
Date	201604
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach Landing
Route In Use	Visual Approach
Flight Plan	IFR
Component
Aircraft Component	Stall Warning System
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Speed All Types Inflight Event / Encounter Unstabilized Approach

Crj-900 captain reported the stick shaker activated in a seemingly spurious manner not justified by the flown airspeeds.