Pinned post

easy books teach you nothing, they just relabel what you already know

Z@b0\/\/ boosted
Z@b0\/\/ boosted

anyone knows how can i get started in ham radio? just wanna listen to radio waves.

Like is there any affordable hardware I can get? Even better if it has an audio jack or some way to plug it in my laptop

Z@b0\/\/ boosted
Z@b0\/\/ boosted

An absolutely amazing article about how GPS works. It's a great achievement to visually explain things so well on the web. (most likely needs a modern browser) ciechanow.ski/gps/

Z@b0\/\/ boosted

with a little high pass filtering the signal is much more visible

Show thread

I feel like a broken record, but the explosion passed again last night over the Mediterranean and, although softened, it's still well recognizable!
You can see all three events on the plot.

volcano explosion reloaded: 36h and another tour around the Earth later the pressure wave reappeared in Sardinia today. Yeah, 36h X 1100km/h = 40.000km

Z@b0\/\/ boosted

Find out how good you are at placing historical events in the right order with this cool new game based on Wikidata's data:

wikitrivia.tomjwatson.com/

This is awesome!

Tonga is 16.000km away from Sardinia, 24.000 away going "the long way". So the blast, traveling at 1100km/h, lasted ~7 hours. And towards the end, the wave front was surely coming from the South direction.

Show thread

Two barometers in Sardinia 50km apart (N-S) detect the first blast with ~2 minutes of delay: the wave front came first from the North-NW direction.

Show thread
Z@b0\/\/ boosted

RT @latestinspace@twitter.com

Tonga’s explosive volcanic eruption seen from even further out in space 😱

🐦🔗: twitter.com/latestinspace/stat

volcano explosion at 20.30 UTC (21.30 local time) as received with my backyard barometer in Sardinia.

Z@b0\/\/ boosted
Z@b0\/\/ boosted
Z@b0\/\/ boosted
Z@b0\/\/ boosted
Z@b0\/\/ boosted
Show older
Mastodon Bida.im

Un'istanza mastodon antifascista prevalentemente italofona con base a Bologna - Manifesto - Cosa non si può fare qui

An antifa mostly-italian speaking mastodon istance based in Bologna - About us - What you can't do here

Tech stuff provided by Collettivo Bida