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yexuqing木蟲之王 (文學(xué)泰斗)
太陽系系主任
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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)國家并不存在其所需的區(qū)域性地震監(jiān)測網(wǎng)絡(luò)。 研究組使用全球安卓智能手機(jī)網(wǎng)絡(luò)來開發(fā)地震探測能力、警報傳遞系統(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到312次地震,震級從1.9級到7.8級不等。98個國家發(fā)布了4.5級以上地震警報,相當(dāng)于每月約60次地震,發(fā)布1800萬條警報。 用戶反饋顯示,85%收到警報的人感覺到了震動,其中分別有36%、28%和23%的人在震動前、震動中和震動后收到了警報。研究組展示了如何大規(guī)模實(shí)施基于智能手機(jī)的地震檢測算法,并通過震后分析對其進(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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