Like fortune tellers who peer into a crystal ball for insight, volcanologists peer into the tiny crystals within lava flows to learn about the magma’s journey before it was erupted onto the surface. Learn more in the #VolcanoWatch article this week: https://t.co/OtIxpo5M2U https://t.co/k5ajO9STWU USGS Volcanoes🌋 Earthquake Alert on Telegram by @EarthquakeAlertTelegram A @grttme project - Other backups: @Hallotme