TY JOUR TI Modern Low-Magnitude Earthquake Swarms of the Gakkel Mid-Oceanic Ridge, Arctic Ocean KW Gakkel Ridge KW low-magnitude earthquakes KW Arctic KW earthquake swarm KW Arctic Ocean JO Russian Journal of Earth Sciences AU Morozov, A.N. AU Vaganova, N.V. AU Starkov, I.V. AU Mikhaylova, Y.A. PY 2023 IS 23 PB Geophysical Center of the Russian Academy of Sciences