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Fresh lahar channels are visible on Ruapehu's eastern slopes, 27 March 2007. The Eastern Ruapehu Lahar Alarm and Warning System , or ERLAWS , is a lahar warning system that was installed on Mount Ruapehu, New Zealand following volcanic eruptions in 1995–1996. The system successfully detected and warned of an imminent lahar in March 2007. The system is being expanded to detect the wider range of lahar threats now expected on Ruapehu. Contents 1 Introduction 2 Sensors 3 Monitoring 4 Transit systems 5 Events 6 Expansion 7 References Introduction The 1995–1996 eruptions of Ruapehu in the North Island of New Zealand left a 7-metre high dam of tephra, consisting of volcanic ash and rock, around the rim of the crater lake. It was realised that some time after the lake refilled and rose above the level of its normal outlet, the tephra dam would collapse, causing a large lahar. Such a lahar resulted in the 1953 Tangiwai disaster when 151

Długość 2,2 km Kraje związkowe Hesja Przebieg trasy Legenda w użyciu   projekt, budowa, konieczność modernizacji węzeł drogowy typu WA węzeł drogowy typu WB skrzyżowanie rondo przejście graniczne punkt poboru opłat (PPO) stacja poboru opłat (SPO) most / wiadukt / estakada prom rzeka – brak przeprawy przejazd kolejowy tunel parking z bufetem stacja benzynowa restauracja hotel / motel lub inne miejsce noclegowe drogowy odcinek lotniskowy roboty budowlane zakaz ruchu Wiesbaden Wiesbaden-Mainzer Straße Droga krajowa B263 ( Bundesstraße 263 ) – niemiecka droga krajowa przebiegająca w całości w granicach kraju związkowego Hesja. Liczy 2,2 km i biegnie w miejscowości Wiesbaden. p   •   d   •   e Drogi krajowe w Niemczech Si

This article is about acids in chemistry. For the drug, see Lysergic acid diethylamide. For other uses, see Acid (disambiguation). "Acidity" redirects here. For the novelette, see Acidity (novelette). "Acidic" redirects here. For the band, see Acidic (band). This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations. (May 2009) (Learn how and when to remove this template message) Zinc, a typical metal, reacting with hydrochloric acid, a typical acid Acids and Bases Acid Acid–base reaction Acid strength Acidity function Amphoterism Base Buffer solutions Dissociation constant Equilibrium chemistry Extraction Hammett acidity function pH Proton affinity Self-ionization of water Titration Lewis acid catalysis Frustrated Lewis pair Chiral Lewis acid Acid types Brønsted Lewis Accep