[7] After establishing itself within the Seattle music community,[8] the station was approved for an LPFM broadcast license by the FCC in 2014,[1][3] and after a successful fundraising campaign began broadcasting at 104.9 FM on September 20, 2017,[1][3] transmitting from the station's studios at 2018a East Union Street in Seattle's Cherry Hill neighborhood.

[11] As of September 2023, Hollow Earth Radio has moved into the renovated Black Lodge space in the Eastlake neighbourhood of Seattle.

KHUH-LP describes its programming as "a forum for underrepresented music, sounds and perspectives" and "local music, found sound, paranormal encounters, crank calls, dreams, etc.

"[12][13] In May 2018, Hollow Earth Radio played host to some of the interviews that were featured in the KING5 series "Priced Out", which "chronicl[ed] the rising cost of living in Seattle and its impact on middle class families", along with longtime businesses.

[14] Notable programs include Urban Mutant Radio, hosted by DJ BLeeK and featuring independent rock and alternative musicians, Radio Eclectus, an avant-garde music program hosted by Michael Schell, and dead rat-titude, hosted by the students of Nova High School and featuring a wide variety of topics from live in-studio performances to conversations about pop culture.