Quite exceptional seismicity happening right now in the Vienna Basin area. Just followed an earthquake almost live on our interactive map at macroseismicsensor.at/. Didn't feel this one in Vienna though. But the one, that happend the last night woke me up.

After one night of computation, the output of the dense reconstruction is looking good. The next step will be to resample to a uniform sampling distance the get rid of the "shadow" effects.

After a revisit of the spot to collect images to fill some gaps, the sparse reconstruction is looking good.

The Viennese high fog has settled, so uniform light is guaranteed. I took this opportunity to take photos from St.Marx DIY, which has grown quite a lot this year. Just started the structure from motion workflow. Let's see if I have captured all important details, or if I have to revisit the site to fill in some gaps.

It's great to have control over the output in 5 ns increments. Beaglebone Black PRU and assembly is fun.

Output pulse with 105 ns and 110 ns length triggered by a GPS PPS signal (yellow line).

Working on a GPS disciplined clock signal for using BeagleBone Black PRUs in my home-office. I'm currently testing the timing performance. The fastest time to set an output GPIO high in response to an input GPS PPS signal is ca. 35 ns using Assembly code.
I didn't code in Assembly for ages, but working directly with all the hardware registers and knowing what every clock cycle does is somehow beautiful.

The earthquake today at 05:24 UTC with an epicenter near and a magnitude of ML = 5.4 (ZAMG) has been detected by the MSS network in the Vienna Basin and marked as an event which might have been felt in a wide area.
The aftershock at 06:01 UTC with a magnitude ML = 4.9 (ZAMG) has been detected as well.

Visit mertl-research.at/mss-nrt-map/ to get near real-time information about the seismicity in the southern Vienna Basin.

Working on building two of my open hardware design seismic dataloggers for a short-term deployment in Greenland. Besides building it, I also have to include some hard- and software improvements. Let's see if it works out...
So far, thanks to KiCad 5, the redesign of a power supply PCB has been a joy.

I've used the last warm autumn day yesterday to go out skateboarding and collecting some photos for my Skateboard Architecture series.

Take a look at the whole series:

An example of the created sound texture of one day recorded August 30, 2012. On that day, a strong earthquake has been recorded by our network.

More sounds: mertl-research.at/seismogroove

I have just published a short article on sonification of a seismic data set on my homepage. We have monitored a glacier lake outburst flood in Greenland. I have started with the creation of a sound texture using the long term ambient seismic noise.

Read more and listen to the sounds here: mertl-research.at/seismogroove

Collected another temporal freeze-point of St.Marx DIY. I think I'll go there again today to fill some last gaps that I've missed the last time.

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