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Is this big enough to produce a Tsunami? Apparently maybe only a small localised one, but I'm supposed to be getting the ferry from Lombok to Bali shortly and t
by insaider 1mo ago
Is this big enough to produce a Tsunami? Apparently maybe only a small localised one, but I'm supposed to be getting the ferry from Lombok to Bali shortly and two of those have already burnt down the last 2 weeks!
- reilly3000 1mo agoSafe travels, friend.
- Grimburger 1mo agoTsunamis are only an issue close to shore. In the ocean it's barely a mild wave. In a boat going further out is the safest thing you can do if there's a tsunami warning.
- wahnfrieden 1mo agoSafer than going inland..?
- lostlogin 1mo agoThere have been 70m tsunamis and lakes get tsunamis too, so… maybe? https://en.wikipedia.org/wiki/List_of_tsunamis https://en.wikipedia.org/wiki/List_of_tsunamis
- stelliosk 1mo agoDepends on how the tsunami was created. By earthquake or by land slide. For example, the following tsunami no boat is safe. https://en.wikipedia.org/wiki/Cumbre_Vieja_tsunami_hazard https://en.wikipedia.org/wiki/Cumbre_Vieja_tsunami_hazard
- embedding-shape 1mo agoThat's a hypothetical "hazard" of a megatsunami and on top of that, seems reaaaally unlikely to happen within the lifetime of any of us: > Giant landslides are rare events.[117] Humanity has never witnessed enormous collapses on La Palma[59] and there is evidence that the western flank of La Palma is currently stable[65] and a collapse in the near future is unlikely.[133] A worst-case scenario giant landslide like the one modelled by Ward and Day 2001 is a very low probability event, probably much less common than once per 100,000 years[123] But, never say never, apparently we're ruining the planet faster than anyone of us thought possible just 50 years ago, so who knows what could happen.
- stelliosk 1mo agoOne that happened, earthquake triggered rockslide: https://en.wikipedia.org/wiki/1958_Lituya_Bay_earthquake_and_megatsunami https://en.wikipedia.org/wiki/1958_Lituya_Bay_earthquake_and...
- decimalenough 1mo agoA ferry in the open ocean is one of the safer places to be during a tsunami. Remember, it's not a surf-style wave, but a gradual increase in water level.
- deleted 1mo ago[deleted]
- throwaway894345 1mo agoboarding the ferry may not be the most pleasant, however.
- aziaziazi 1mo agoAfter the tsunami, would the current induced by the water drawback disrupt the ferry ability to come back ? I wonder if the ocean “rise” again (water on top of water) or if it’s more a current-style (water push water) movement.
- monster_truck 1mo agoExtremely. They are quite slow laterally (a couple knots while docking), the lateral currents (which are not constant or unidirectional) reach 2-4x+, throwing them into whatever happens to be in the way. AFAIK the bigger issue is that the boats are grounded so violently when the water recedes that the hulls get destroyed before they even have a chance. This tends to be why they put everything they have into getting further out to sea the moment a warning is issued.
- kylecazar 1mo agoThere's an eerie video that went around of a ship hitting the 2011 tsunami in Japan at open sea. It demonstrates the idea pretty well. https://youtube.com/shorts/igfP5CQAkHU?is=TJqk4lxxhYkK8hQV https://youtube.com/shorts/igfP5CQAkHU?is=TJqk4lxxhYkK8hQV
- zamadatix 1mo agoSame video with normal controls: https://youtu.be/igfP5CQAkHU https://youtu.be/igfP5CQAkHU Longer & significantly less edited video from the above's cited source: https://youtu.be/-VcWF8dIDj4 https://youtu.be/-VcWF8dIDj4. There is a comment with the translations of what's being said that adds a lot of info/meaning. Particularly this was at a relatively shallow depth (38 meters) only a couple miles off the coast, the above ferry would spend most of its time in >200 meter waters according to https://www.arcgis.com/apps/mapviewer/index.html?webmap=019a062e3c4440e09aad024ca60c0107 https://www.arcgis.com/apps/mapviewer/index.html?webmap=019a... so would probably look nothing like this at most points in the trip.
- wiml 1mo agoI've seen "possible tsunami" pre-warnings, and a sea level gauge at/near Lembar showing sea level oscillations - so I would recommend keeping a close watch on some information source that's better than HN comment threads, yes.
- lostlogin 1mo agoCorrect, but also, I’d bet there is a lurking tsunami expert here somewhere. Nothing is ever too niche for HN.
- Melatonic 1mo agoThere's a tsunami warning list you can sign up for. As well as global earthquake alerts. In my experience they arrive very quickly Usually earthquakes on land don't trigger tsunamis but are more damaging locally
- pestatije 1mo agothe tsunami risk is negligible compared to the fire risk
- bdickason 1mo agoI would upgrade the ferry and make sure to get a high quality one given all the swell in the ocean already (most of bali had 6ft+ waves yesterday) and this incident. Not worth the risk.
- rootsudo 1mo agoInteresting times for the ferry indeed
- Polizeiposaune 1mo agoIndonesia's tsunami bulletins appear to be here: https://rtsp.bmkg.go.id/publicbull.php https://rtsp.bmkg.go.id/publicbull.php They've declared the event over - some waves were generated but nothing particularly large. Bulletin 3 for the recent quake includes wave height observations - maximum reported was 94cm; most were under 50cm.
- yxhuvud 1mo agoEasily big enough, but how deep it was generated and how the movements happened do impact the risk a lot.
- seanmcdirmid 1mo agoLombok will have lots of higher ground at least. You really just have to be careful on and near the beach.