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yexuqing木蟲(chóng)之王 (文學(xué)泰斗)
太陽(yáng)系系主任
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[交流]
Global earthquake detection and warning using Android phones
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Global earthquake detection and warning using Android phones 利用安卓手機(jī)進(jìn)行全球地震探測(cè)和預(yù)警 ▲ 作者：RICHARD M. ALLEN, ALEXEI BARSKI, MICAH BERMAN, ROBERT BOSCH, YOUNGMIN CHO, XIA SUMMER JIANG, ET AL. ▲鏈接： https://www.science.org/doi/10.1126/science.ads4779 ▲摘要： 地震預(yù)警系統(tǒng)越來(lái)越多地被部署為減少地震損失的一種戰(zhàn)略，但是在許多地震易發(fā)國(guó)家并不存在其所需的區(qū)域性地震監(jiān)測(cè)網(wǎng)絡(luò)。 研究組使用全球安卓智能手機(jī)網(wǎng)絡(luò)來(lái)開(kāi)發(fā)地震探測(cè)能力、警報(bào)傳遞系統(tǒng)和用戶反饋框架。在3年的運(yùn)行中，該系統(tǒng)在土耳其每月平均探測(cè)到312次地震，震級(jí)從1.9級(jí)到7.8級(jí)不等。98個(gè)國(guó)家發(fā)布了4.5級(jí)以上地震警報(bào)，相當(dāng)于每月約60次地震，發(fā)布1800萬(wàn)條警報(bào)。 用戶反饋顯示，85%收到警報(bào)的人感覺(jué)到了震動(dòng)，其中分別有36%、28%和23%的人在震動(dòng)前、震動(dòng)中和震動(dòng)后收到了警報(bào)。研究組展示了如何大規(guī)模實(shí)施基于智能手機(jī)的地震檢測(cè)算法，并通過(guò)震后分析對(duì)其進(jìn)行改進(jìn)。 ▲ Abstract： Earthquake early-warning systems are increasingly being deployed as a strategy to reduce losses in earthquakes, but the regional seismic networks they require do not exist in many earthquake-prone countries. We use the global Android smartphone network to develop an earthquake detection capability, an alert delivery system, and a user feedback framework. Over 3 years of operation, the system detected an average of 312 earthquakes per month with magnitudes from M 1.9 to M 7.8 in Türkiye. Alerts were delivered in 98 countries for earthquakes with M ≥4.5, corresponding to ~60 events and 18 million alerts per month. User feedback shows that 85% of people receiving an alert felt shaking, and 36, 28, and 23% received the alert before, during, and after shaking, respectively. We show how smartphone-based earthquake detection algorithms can be implemented at scale and improved through postevent analysis. |
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