As the rain continues to fall, the probability of a gradual <a href="/en/landslide">landslide</a> increases.
<ul>
<li>When and where it will occur is not clearly foreseeable.</li>
<li>Small landslides, groundwater eruptions, and other &quot;increasing <a href="/en/signs">signs</a> of danger&quot; can sometimes be felt.</li>
</ul>
<blockquote>
When and where this will occur is not clearly foreseeable.
</blockquote>
<ul>
<li>Short time between the appearance of observable signs and the development of a major disaster</li>
<li>Observable signs&quot; vary depending on the cost of observation.<ul>
<li>For example, I think that if sensors that show displacement in millimeters are buried at one-meter intervals, it would be possible to predict the occurrence of a landslide five seconds later.</li>
</ul>
</li>
<li>The rate of <a href="/en/exponential%20development">exponential development</a> is too fast for the cost of prevention to be worth it.</li>
</ul>
relevance
<ul>
<li><a href="/en/avalanche%20metaphor">avalanche metaphor</a>.</li>
</ul>
<hr>
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Landslide Metaphor