seismometer

For example, a seismometer is a big lump of heavy on springs, and when the Earth moves, there is a force between the heavy and the frame holding it.

Siraj & Loeb (arXiv, not reviewed) try to use the Manus Island seismometer’s detection of the airburst to refine this.

To do this, the seismometer's output signal was greatly amplified, then frequency modulated onto a relatively low frequency carrier (1–2 kHz).

There is open distributed monitoring for all kinds of signals, like seismometer networks, weather, ads-b...

Just in case folks are wondering why funding for seismometer networks has fallen off a cliff, it's not what you might think.

What is the difference in sensitivity between a seismometer made in ~1900 vs 2023?

The failure of a seismometer and a hypercasual puzzle game have very different consequences.

Drop the seismometer from space, both are falling at the same rate and there is no force and no recorded acceleration - fine.

It seems like it shouldn't be that hard, I'm kinda imagining something like a weather station or a seismometer.

Or as a seismometer to detect earth movements, nearby vehicles, even people walking.

I think it's strange they even mention the cost of a seismometer in the article.

Sort of like an old-school seismometer scratching out the lines.

Turning billions of smartphones into a global seismometer network is one of those "why didn't we do this sooner?" ideas.