Screen Shot 2017-09-21 at 1.10.15 PM

Photo: USGS 舊金山土壤液化潛勢地圖:紅色標示為極度危險區,橘色標示為高危險區,黃色標示為普通危險區,綠色和白色為低危險區和極低危險區。

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Screen Shot 2017-09-21 at 1.10.15 PM

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