How Far Do You Need to Run From a Tsunami?

The ocean just... left. In 2004, on a beach in Thailand, the water pulled back hundreds of meters and people walked out to take a look. Minutes later, it came back. So if a tsunami is coming, how far do you actually need to run? And what are your odds of surviving at every distance from the shore? We break it down with real data from the 2004 Indian Ocean tsunami and the 2011 Japan tsunami. ⏱️ CHAPTERS 0:00 The Ocean Disappeared 0:26 What Even Is a Tsunami? 0:58 As Fast as a Jet Plane 1:29 How a 1-Meter Wave Becomes 30 Meters 1:50 It Doesn't Stop: The Sea Just Keeps Rising 2:05 The Warning Sign Most People Ignore 2:29 How Strong Is Tsunami Water? 2:46 The Debris Blender 3:06 Your Odds at Every Distance 3:20 Zone 1: Out at Sea 3:42 Zone 2: On the Beach 4:06 Zone 3: 1–3 km Inland 4:37 Zone 4: 10+ km Away 4:54 Why Height Matters Too 5:17 Who Is Hit the Hardest 5:33 What Actually Saves You 5:40 The 10-Year-Old Who Saved 100 People 6:07 The "Miracle" of Kamaishi 6:31 Survival Cheat Code: 5 Rules 6:34 Rule 1: Long or Strong, Get Gone 6:49 Rule 2: Go Up or Go Far 7:01 Rule 3: Go on Foot 7:13 Rule 4: Go Vertical 7:23 Rule 5: Don't Go Back 7:42 If You Get Caught in the Water 7:55 If You're on a Boat 8:05 The Biggest Wave Ever Recorded (524 m) 8:32 You Don't Film It. You Run. 💬 Would you have recognized the warning signs? Tell us in the comments, and let us know which disaster we should break down next. 🔔 Subscribe, and share this with someone who's going to the beach soon. It could actually save their life. 📚 Sources & facts mentioned: • Doocy et al., WHO Bulletin (2007): tsunami mortality in Aceh, Indonesia • PLOS Currents: The Human Impacts of Tsunamis, 1900–2009 • Fatality vs. inundation depth studies of the 2011 Tohoku tsunami (Ishinomaki, Japan) • Tilly Smith, Mai Khao Beach, Phuket (2004) • The "Miracle of Kamaishi," Japan (2011) • Lituya Bay megatsunami, Alaska (1958): 524 m run-up Survival percentages are drawn from studies of specific real disasters and will vary with every tsunami. Always follow your local tsunami warnings and evacuation routes. #tsunami #survival #whatif #disaster #science #animation