hydrothermal explosion Watch stunning footage of a massive hydrothermal explosion that closed part of Yellowstone Caught on film: a hydrothermal explosion occurred near Sapphire Pool in Biscuit Basin, located just north of Old Faithful Advnture NewsletterAll the latest inspiration, tips and guides to help you plan your next Advnture!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1Garmin SOS hailed as "most reliable way to call for help" in the backcountry after rescue of hiker mauled by bear 2Is it OK to wear socks with hiking sandals?3Finally, "a glimmer of closure" as personal items found on Colorado mountain where hiker disappeared 19 years ago4Short on time? Check out these 4 hacks to maximize your hike5I ran 50 km in The North Face shirt Katie Schide wore to win the UTMB – and it’s my new favorite running top