We're all aware of the devastating impact that tsunamis can have, and the potential for tragedy continues to drive research into improved detection methods. A new study reports on a more usual approach to tsunami detection: the monitoring of muons.
These highly energetic, elementary particles are created as cosmic rays arrive from space, are everywhere in the atmosphere, and can harmlessly pass through just about anything, including you: 100,000 of them will pass through your body while you read this sentence.
An incredibly sensitive instrument is required to detect muon movement, which brings us to the Tokyo-Bay Seafloor Hyper-Kilometric Submarine Deep Detector, or the TS-HKMSDD for short. It's fitted inside theThe TS-HKMSSD had the honor of detecting tsunami waves through muon ripples for the first time. Important from the perspective of earlier warnings, the detection happened in real-time and was shown to be highly accurate.
The new research outlines how the TS-HKMSDD system detected a mild tsunami passing through Tokyo Bay in September 2021, caused by a typhoon approaching Japan from the south. As the ocean swelled, the number of muons changed slightly, scattered by the volume of water. "Thanks to the success we've had from early tests such as this, similar systems are already being trialed in the UK and Finland,""Obviously, an undertaking like this comes with challenges, and installing delicate instruments in a busy tunnel could be difficult. But we are grateful for the cooperation of the agencies responsible for the Tokyo Bay tunnel."The muon detectors that make up the TS-HKMSSD are actually rather small, around 2 meters in length.
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