Vijayawada, Oct 27 (UNI) The very severe cyclonic storm ''Arnab'' over the Westcentral Bay of Bengal moved nearly westwards with a speed of 22 kmph during the past six hours and lay centered over the same region 260 km southeast of Visakhapatnam, 300 km east-southeast of Kakinada, 390 km east of Machilipatnam and 460 km east of Bapatla.