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cleanup post
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1dancook committed Jan 5, 2024
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Expand Up @@ -77,7 +77,7 @@ quakes.loc[dt_mask].ttl.value_counts()

```text
震源・震度情報 537
震度速報 105
震度速報 105
震源に関する情報 41
顕著な地震の震源要素更新のお知らせ 4
```
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854 Adjacent Sea of Ishigakijima Island 1
```

I'm a little rusty on my Japanese geography, but I do know that at least 4 of these entries are relevant:
I'm a little rusty on my Japanese geography, but I do know that at least 6 of these entries are relevant:

```text
acd en_anm
390 Noto, Ishikawa Prefecture 318
495 Off the Coast of Noto Peninsula 145
379 Off the Coast of Joetsu and Chuetsu, Niigata Prefecture 18
498 Adjacent Sado 35
494 Off the west Coast of Ishikawa Prefecture 6
497 Toyama Bay 4
```

Adding those together, I get a total of **526**. The counts from other areas are so small they make little difference. Remember, NHK's number was *786* -- and that was almost 16 hours ago.
Adding those together, I get a total of **536**. The counts from other areas are so small they make little difference. Remember, NHK's number was *786* -- and that was almost 16 hours ago.

### Wrapping up

Now with this information I *do* understand that my method of just checking for quakes from `390` was not adequate since there are other areas that are related and likely have an impact (as far as an aftershock is concerned).
Now with this information I *do* understand that my method of just checking for quakes from `390` was not adequate since there are other areas that are related and likely have an impact (as far as an aftershock is concerned). I believe part of my misunderstanding was due to how those codes work- and this bit of work from above helps to make that more clear.

In a follow up at some point it would be good to actually use coordinates as a window. Another interesting angle would be to see how many earthquakes had a registered intensity on Noto peninsula.

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