‘Breathing’ sidewalk clip
- A dramatic video resurfaced showing sidewalk tiles appearing to 'breathe' before a major Japan earthquake. - That clip collected about 256,000 views and 5.7K likes while sparking intense online debate. - Commenters argued over soil liquefaction, P-wave effects, and whether the footage shows pre-shock ground behavior. (x.com)
The clip now recirculating as a sidewalk “breathing” in Japan was filmed during the January 1, 2024 Noto Peninsula earthquake, and earthquake experts already have a plain-language explanation: liquefaction. (usgs.gov) Liquefaction is what happens when waterlogged, loosely packed soil is shaken so hard that it briefly loses strength and starts behaving more like a liquid than solid ground, according to the U.S. Geological Survey. The agency cites Japan’s 1964 Niigata earthquake as a classic case that destroyed buildings. (usgs.gov) The original post came from X user @mmmin726 on January 1, 2024, in the first hours after the Noto quake. A translated version of the post said the user was heading to a night shift at a hospital when the ground “began to shake violently” and crack in front of them. (boredpanda.com) Japan’s Meteorological Agency maintains a dedicated portal for the 2024 Noto Peninsula earthquake and lists it as the national event page for the disaster. Broad summaries of the quake identify the main shock at 16:10 Japan time on January 1, 2024, with magnitude 7.6 on the Japan scale. (jma.go.jp) The reason the clip keeps resurfacing is that it looks like motion before the main shaking, and commenters often point to P waves, the faster earthquake waves that arrive first. The U.S. Geological Survey says P waves are compressional waves, while the stronger S waves and surface waves arrive later and usually produce larger motion at the surface. (usgs.gov) That does not make the video proof of some mysterious “pre-shock” behavior. The U.S. Geological Survey’s description of liquefaction ties the effect to strong ground shaking itself, and the clip’s visible heaving is consistent with soil and pavement responding as shaking passes through saturated ground. (usgs.gov) Japan has older video records of the same phenomenon. A widely cited March 11, 2011 video from Makuhari, Chiba, says it shows fissures moving and water from liquefaction coming to the surface just after the magnitude 9.0 Great East Japan earthquake. (youtube.com) So the most grounded reading of the “breathing” sidewalk is the least cinematic one: earthquake shaking hit wet, unstable soil, and the pavement moved with it. The image is unusual, but the mechanism has been documented in Japan for decades. (usgs.gov)
