Question 1

リアルタイム地震モニターとは？

Accepted Answer

A real-time earthquake monitor displays seismic activity as it is detected by global seismographic networks, showing magnitude, location, depth, and time of earthquakes within minutes of occurrence.

Question 2

地震のマグニチュードはどう測定するの？

Accepted Answer

Earthquake magnitude is measured using the Richter scale or moment magnitude scale (Mw), which quantifies the energy released at the source. Each whole number increase represents roughly 32 times more energy.

Question 3

地震が多い地域は？

Accepted Answer

The Pacific Ring of Fire experiences about 90% of global earthquakes. Other active regions include the Alpide belt (Mediterranean to Himalayas) and the Mid-Atlantic Ridge.

Question 4

大地震はどのくらいの頻度で発生する？

Accepted Answer

On average, about 15 magnitude 7.0-7.9 earthquakes occur annually worldwide, while magnitude 8.0+ events happen roughly once per year. Smaller earthquakes are far more frequent.

Question 5

地震は予知できる？

Accepted Answer

Currently, earthquakes cannot be reliably predicted. Scientists can identify areas of high seismic risk and calculate probabilities, but precise short-term prediction remains impossible.

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