• Eruption detected at Semisopochnoi volcano, Alaska

    An eruption signature was detected at Semisopochnoi as strong tremor on local seismic and in regional infrasound networks on Adak Island, Alaska Volcano Observatory reported at 10:25 UTC on December 7, 2019. The event started at 09:26 UTC (00:26 AKST) on December 7…

  • Shallow M6.0 earthquake hits Tonga region

    A shallow earthquake registered by the USGS as M6.0 hit Tonga region at 13:04 UTC on December 6, 2019. The agency is reporting a depth of 10 km (6.2 miles). EMSC is reporting the same magnitude and depth. The epicenter was located 164 km (101) WNW of Hihifo…

  • Tropical Storm “Pawan” about to make landfall over Somalia

    Tropical Cyclone "Pawan" is slowly weakening on its way toward Somalia. Landfall is expected late November 6 into November 7, south of Eyl, an ancient port town in the northeastern Nugal province. Pawan is the 8 named storm of the 2019 North Indian Ocean…

  • Planetary wave supercharging noctilucent clouds over Antarctica

    An atmospheric wave about half as wide as the Earth is supercharging noctilucent clouds (NLCs) in the southern hemisphere, with NASA's Aeronomy of Ice in the Mesosphere (AIM) spacecraft detecting the phenomenon in this series of south polar images from November…