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We present the discovery of a large population of stellar streams thatsurround the inner Galaxy, found in the Gaia DR2 catalog using the newSTREAMFINDER algorithm. Here we focus on the properties of eight newhigh-significance structures found at Heliocentric distances between 1 and 10kpc and at Galactic latitudes $|b|>20\deg$, named Slidr, Sylgr, Ylgr,Fimbulthul, Sv\"ol, Fj\"orm, Gj\"oll and Leiptr. Spectroscopic measurements ofseven of the streams confirm the detections, which are based on Gaia astrometryand photometry alone, and show that these streams are predominantly metal-poor.The sample possesses diverse orbital properties, although most of the streamsappear to be debris of inner-halo globular clusters. Many more candidatestreams are visible in our maps, but require follow-up spectroscopy to confirmtheir nature. We also explain in detail the workings of the algorithm, andgauge the incidence of false detections by running the algorithm on a smoothmodel of the Gaia catalog.

The Streams of the Gaping Abyss: A population of entangled stellar streams surrounding the Inner Galaxy