On a more general note, not having looked too closely into it yet, I would say:
- If it is correct that the anomaly just showed up quickly, more or less in an instant, that many of the publically available, searchable and viewable satellite data sets cover much larger timeframe segments. In other words: They only seem to display timeframes as little as hours. In still other words: If that is the case, for publically viewable data, anomalies that happen quickly and more or less instantly, like for example, an impact of a smaller comet fragment, likely won't show up on those images, even though it happened! For example, I tried to see if I can find/see the mentioned anomaly on the
earth.nullschool website, at the reported time and place, without success. But, if you look closely, you can see that the minimal displaying time is 3 hours there. So, in other words: the image is updated (and/or captured/displayed) only every 3 hours. Which means that an event that happens quickly in a time span of less than 3 hours isn't likely to show up, even though it happened. The after effects might show up, though. That might also be the case for other data sets that are not recorded via satellite, such as buoy data. I also think it is likely that there are datasets that are not available to the public where they can record/see everything that happens on earth pretty much in real time. It would be interesting to see those data sets, but, most likely, we will never see them.
- Generally speaking, I don't think that we can discount either of the following possibilities: outgasing, magnetic type event, earthquake type event, volcano type event, comet type event or even a software type of issue on the computer end. Because, despite what modern mainstream science claims (either directly or by assumption) the behavior, creation and generation of waves, especially in large bodies of water such as the oceans is not that well understood. I'm of the opinion that, despite what they claim to know, that there are many mysteries and variabilities to the subject of waves and water that are not well understood at all.
- Therefore, I do think we really don't know much about how water in the oceans can behave and what type of triggers can lead to what type of results. In other words; I think it would also be totally possible, that a for example, a small comet like event, a magnetic type event or an outgasing type event can really produce a rather huge local event while the waves coming inland close by might not be affected by it that much. The behavior and reaction of water in general, and large bodies of water in oceans in particular, are still not well understood at all IMO.
