There is more than one artist with this name:

1. Atmospheric Sludge/Post-Metal from Pulawy, Poland

Bandcamp

2. Kaldera is a metal band from Bristol, UK who released their debut album 'Backlash' in 2015.
https://kalderauk.bandcamp.com/

3. There is also Kaldera from Nauru
http://www.kalderaband.co.nr
Achievement of Kaldera Band.
1. Release Song Faith at Relax FM 90,8 Moscow Russia At 11:23 AM Routimes ( 02:26PM WIB) Oct16, 2009..
2. Guest Star at Tea Box Cafe(October 2008).
3. Guest Star at "Taman Mini Indonesia Indah" (April 19, 2008)
4. Perform at Kemang Food Festival (December 31 2007).
5. Making of Mini Album.
6. Guest Star at Pasaraya,on event “Kompetisi Band Cilik” (July 15 2007).
7. Perform at Mangga Dua Square (April 7, 2007).
8. Perform at Margo“Warna Music Production” Margie Singer (Jazz), Margo City Depok (June 25, 2007).
9. Home Band “Pit Stop Café, Sari Pan Pacific Hotel”, (April - May, 2007).
10. Interview On Air with "Radio JIS Seventeen FM Belitung", (May 12, 2007).
11. Perform at “Mangga Dua Square” on event “Gong Xi Fa Cai” as one of delegation from "Import Musik", (February 24, 2007).
12. Interview With "Radio RRI Pro 2 FM", (December 12, 2006)
13. Perform at Pondok Indah Plaza on event “Sunday Show Case (Import Musik)”
14. Perform at PT. Excelcomindo Pratama, Tbk.

Other Achievements
1. “Top Chart Request Indie Band” at "Radio JIS Seventeen FM, during time 4 weeks for the song title “Sesuatu Yang Hilang”.
2. Ranked 3 (three) "Indie Band" for the title song "Faith", during the period of 6 weeks on MOMEA FM Radio Palembang.
3. Top Chart Request Play List "Indie Band" on Radio FM Palembang MOMEA for 6 weeks for the title song “Sesuatu Yang Hilang”.
4. Chart Request Play List OZ FM Lampung for the title song “Malaikat Cinta”.
5. Top 20 Candidate, on “Nubuzz 1.2” Prambors Jakarta.
6. Contract with "Import|Musik" Music for Digital Music (Ring Back Tone).
7. Consignment contract to sell cd with OZ FM Lampung.
8. Consignment contract to sell cd with JIS Seventeen FM Belitung.
KalDera

4. Hungarian Acoustic Band:
https://soundcloud.com/kalderazenekar
Founded in 2012, Kaldera is an acoustic duet of childhood friendship, somewhere in the northern wilds and southern highways. Roadside folk music is a dialogue of introverted moods with guitar and vocals. If you say blues, we say grunge. If you say grunge, we say folk. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.