S wave -- a shadow zone appears when the velocity suddenly decreases 103-180 degrees from the epicenter. Describe the differences between P and S waves. P waves expand and contract, can move through liquid solid and gas. S wave moves up and down or side to side moves through only solids.
Optimal conditions to see the northern lights in Iceland is when skies are clear and dark (away from the city lights, in cold temperature and ideally from mid-September to mid-April.
Great bus tour to see the northern lights in Iceland. Operated by Reykjavik Excursion. Three independent film makers from Iceland have been at 50 different locations around Iceland & spend 130 nights last 3 years. Golden Circle & Snowmobiling is a day full of excitement and adventures.ood tips on where to see northern lights. Get some tips how to plan your trip to Iceland around the weather. ItÂ´s a lifetime experience to watch the northern lights out on the open sea, surrounded by mountains and with ReykjavikÂ´reykjavÃ­k s city lights in the. background