Visualizing the magnitude and depth of earthquakes that occurred between 2017 and 2018 on a global scale



This article, originally posted in Japanese on 21:00 Nov 19, 2019, may contains some machine-translated parts.
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When an earthquake occurs, information on the seismic intensity and epicenter of each place is reported in a preliminary report, but unlike the seismic intensity actually felt, the depth and scale of the epicenter are difficult to understand intuitively even if they are indicated by numbers.

The globe released by Lalca Nicola is the 3D visualization of the epicenter of the earthquake that occurred from July 2017 to July 2018, and how much earthquake occurred on the earth wherever You can see in one shot.

Earthquakes between July 2017 and July 2018
https://glowy-earthquakes.glitch.me/



When you visit the site published by Nicola, the epicenter map will be displayed. The epicenter is displayed with countless points on the earth where the land is drawn with thin lines. The position of the point indicates the depth of the epicenter, and the size of the point indicates the magnitude. In addition, in order to display the epicenter easily, the depth has been expanded by 8 times. The earthquake data is published by the US Geological Survey (USGS).



The globe can be moved freely by dragging, and you can zoom in and out with the mouse wheel. For example, when zooming around Japan, an earthquake-prone country, it looks like the following. The epicenter is off the Pacific and is concentrated along the red line ...



Compared with the following figure released by the

Japan Meteorological Agency, you can see that the line where the epicenter is concentrated is along the Japan Trench , the boundary between the Pacific Plate , North America Plate , and Philippine Sea Plate .



In addition to the offshore Tohoku region, the Pacific Plate is also sinking into the North American Plate in the

Aleutian Trench that extends from Kamchatka Peninsula in Russia to Alaska in the United States. Many earthquakes are also occurring in the Aleutian Trench (right red frame), but it is clear from the epicenter map that the epicenter is far deeper than the sea near Japan (left red frame).



Nicolas, who develops a globe that can be operated from a web browser with the web API ' ArcGIS API for JavaScript ' for mapping application development, creates this epicenter map as part of the hackathon ' # 30DayMapChallenge ' that creates a map with the given theme I was told. Nikola's epicenter map is published using Glitch , a service that allows you to publish web apps for free.

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in Web Application,   Science, Posted by log1i_yk