More on that article in @Reuters today that cited bad seismic analysis to invoke a series of explosions before the large one in Beirut last week. Analysis but #SeismoTwitter, notably @KaseyAderhold, @drrocks1982, and @stevenjgibbons showed it was actually marine exploration...1/n

The figure below shows ~20 minutes of seismic data around the explosion. These are the exact same data cited by the Israeli "expert", downloaded from the same source. An explanation follows.

First, the seismometer that recorded this signal is called station IM.CY603. This instrument is located on the seafloor between Lebanon and Cyprus.

See the two big signals in the middle of the figure, one at ~2320s and one at ~2370s? Those are the two big explosions.

See the tiny little pulses in red that occur before the big explosions? Those are the things that Israeli scientist Boaz Hayoun claims are small explosions that were part of a weapons system.

This is wrong.

You have to go through some pretty impressive contortions to ignore (a) the many pulses that precede the six in red, and (b) the many pulses that follow even the largest explosion. In fact, you have to very specifically ignore a lot of data.

The appearance of those little pulses is classically what we see in marine exploration surveys. The precise timing between them is what we expect in marine surveys. The fact that these were recorded ONLY on stations in the sea (not on land) is what we expect from marine surveys.

This type of misrepresentation of data, particularly when it relates to a tragedy like the Beirut explosions, is unconscionable. Further, suggesting that the larger explosions were triggered by a weapon, as the original article did, is exceptionally dangerous.

I don't want to link to the original article, but here's a screen grab if you want to look it up yourself. It's a seriously dangerous and utterly inaccurate story.

For more on what these signals *actually* are, see @KaseyAderhold's discussion here. https://twitter.com/KaseyAderhold/status/1293962260138795008