[x3d-public] Seismicity related Icelandic fissure eruption

[John Carlson]

Pretty awesome, Andreas,  my only critique is that the earthquakes are hard
to distinguish from the image in the initial view in dim lighting and
non-bright screen.  Perhaps adding a arc2d, that follows the camera, around
each earthquake (think of drawing an arc around a disc) would help with
visibility and avoid blobbiness.

On Wed, Nov 15, 2023 at 12:21 PM Andreas Plesch <andreasplesch at gmail.com>
wrote:

> Let me share a visualization of the the hundreds of earthquakes now
> occurring daily in Iceland, heralding a volcanic eruption expected for
> any day now:
>
>
> https://andreasplesch.github.io/earthquakes-3d/iceland/reykjanes-2023/index.html
>
> It shows current seismicity along the opening fissure.
>
> It is pure x3dom, mashing up the X3D geospatial component, gltf
> content, geojson processing and live data sourcing from the Icelandic
> Meteorological Office. The data access required a cors proxy which may
> not always be available but was stable during testing.
>
> A new idea was to use an existing glb of a digital elevation model
> draped with imagery (provided by Icelandic Institute of Natural
> History) in an accurately located Geolocation node which worked very
> well to coregister it perfectly with the earthquakes. The glb is heavy
> and requires a good data connection but renders well.
>
> It would be cool to have the earthquakes animate over time. It may
> work to assign texture coordinates based on time of occurrence and
> animate a texture transform. The texture would be 1d with transparent
> cutoffs.
> Let's see. The total period is 48h. The texcoord could be fractional
> hours. So to show the 1h of earthquakes starting at the 10h mark, the
> texture transform would shift by -10. Scaling can change the duration.
> Scaling up by 2 would show less earthquakes, so only 30 minutes. I
> think this could work and be fast.
>
> -Andreas
>
> --
> Andreas Plesch
> Waltham, MA 02453
>
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