Narrative:

Our flight was going to ZZZ and prior to takeoff and en-route we were aware of the prevailing weather in ZZZ. The ATIS was showing 330@6 vis 3/4; HZ; 003 ovc; 18/13; 3008 and using ILS runway xxr. We briefed as normal and terrain was a mentioned as a threat and I had brought up my terrain map to help mitigate the threat. During decent ZZZ switched runways to the xy's due to VMC conditions east of the field allowing for visual approaches. We were following aircraft and were told to reduce speed. As we kept descending ZZZ1 came into view and I had mistakenly took this as ZZZ and called the field in site; ZZZ1 is more north of the terrain and at this point not a concern. We were cleared for the visual approach at this time and I realized that I had identified ZZZ1 instead of ZZZ as it came into view from under the marine layer. The pilot flying was still following the RNAV approach and was going from zzzzz to ZZZZZ1 but was hand flying and was still in a descent. We were handed off to tower and were cleared to land but wanted us to square our base to final for traffic ahead. I programed a straight in final in the FMS and the pilot flying started the turn but was still in a descent. I had noticed the pilot flying was getting low and then was immediately followed by a grd proximity message. I instructed the pilot flying to level off which he did and then landed without incident. I had all terrain in site during the approach to landing. The cause of this event was due to the pilot flying not aware of the close proximity of the terrain as he kept a descent while squaring the base to final. Be fully aware and briefed of all possible threats including terrain in any phase of flight. Be ready to possibly take control of the aircraft or execute a go-around and in extreme situations climb-out of a CFIT situation.

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Original NASA ASRS Text

Title: Airline pilot reported receiving a Terrain Warning after preparing to land initially at the wrong airport.

Narrative: Our flight was going to ZZZ and prior to takeoff and en-route we were aware of the prevailing weather in ZZZ. The ATIS was showing 330@6 Vis 3/4; HZ; 003 OVC; 18/13; 3008 and using ILS RWY XXR. We briefed as normal and terrain was a mentioned as a threat and I had brought up my terrain map to help mitigate the threat. During decent ZZZ switched runways to the XY's due to VMC conditions east of the field allowing for visual approaches. We were following aircraft and were told to reduce speed. As we kept descending ZZZ1 came into view and I had mistakenly took this as ZZZ and called the field in site; ZZZ1 is more north of the terrain and at this point not a concern. We were cleared for the visual approach at this time and I realized that I had identified ZZZ1 instead of ZZZ as it came into view from under the marine layer. The Pilot Flying was still following the RNAV approach and was going from ZZZZZ to ZZZZZ1 but was hand flying and was still in a descent. We were handed off to tower and were cleared to land but wanted us to square our base to final for traffic ahead. I programed a straight in final in the FMS and the Pilot Flying started the turn but was still in a descent. I had noticed the Pilot Flying was getting low and then was immediately followed by a GRD PROX message. I instructed the Pilot Flying to level off which he did and then landed without incident. I had all terrain in site during the approach to landing. The cause of this event was due to the Pilot Flying not aware of the close proximity of the terrain as he kept a descent while squaring the base to final. Be fully aware and briefed of all possible threats including terrain in any phase of flight. Be ready to possibly take control of the aircraft or execute a go-around and in extreme situations climb-out of a CFIT situation.

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.