Tasuma-gazi gazi sankaba, laze plumes ani limnic eruptions¶

Tasuma ni dugukolo funteni yɔrɔw bɛ gazi yebaliw bɔ, minnu bɛ se ka mɔgɔ ka ɲɛnamaya bila farati la hali ni tasuma-fanga-bɔnba si ma kɛ, k’a sɔrɔ tasuma-fanga-kɛnɛ jugumanba kɔw bɛ se ka barika sɔrɔ ka gazi ɲuman (\(CO_2\)) saniyalen sankaba minnu bɛ mɔgɔ dafiɲɛ bɔ, balawu dɔ la min man teli ka kɛ, n’o bɛ wele ko limnic eruption (lake overturn). A tɛ i n’a fɔ tasuma-fanga walima kungo tasuma sisi min bɛ wuli san fɛ san fɛ, tasuma-fanga ni dugukolo-gazi gazi saba minnu bɛ mɔgɔ faga kosɛbɛ, n’olu ye gazi ɲuman (\(CO_2\)), sulfure d’hydrogène (\(H_2S\)), ani dioxyde de sulfure (\(SO_2\)), olu ka gɛlɛn kosɛbɛ ka tɛmɛ fiɲɛ gansan kan (\(1.2\text{ to }2.2\text{ times}\) ka bon ka tɛmɛ fiɲɛ jalen kan). Sanni u ka pan sanfɛ, o gaziw bɛ woyo ka jigin duguma i n’a fɔ baji jilama yebali, ka ɲɔgɔn lajɛ kɔw kɔnɔ, tasuma-fanga-yɔrɔw, dugujukɔrɔyɔrɔw, sɛgɛsɛgɛliw, nɛnɛba ani kɔgɔjida laminiw. O waati kelen na, ni kɔgɔjida lamini jisuma wulilen donna kɔgɔji kɔnɔ, a bɛ kɔgɔji tobi ka kɛ asidi kloroki (\(HCl\)) sisi finman ye min falen don ani tasuma-fanga galasi sɔgɔlenw minnu bɛ wele ko laze (lava haze). Ɲɛnamaya bɛ bɔ gazi jaanw dɔnni na minnu bɛ dugukolo duguma, ka jiginni kɛ teliya la kɔrɔnfɛla ni fiɲɛ tigɛlen, ani k’a faamu mun na ni ninakili kelen min bɛ \(10\text{ fo }30\text{ percent}\) gazi ɲuman walima \(1,000\text{ ppm}\) sulfure hydrogène la, o bɛ kɛ sababu ye ka mɔgɔ hakili bɔ o yɔrɔnin bɛɛ ("knockdown").

Aw bɛ o kɛ sisan¶

1. Yɛlɛn ka tigɛli kɛ ka wuli ka fiɲɛ tigɛ (ni fiɲɛ ye degere 90 ye) o yɔrɔnin bɛɛ. Tasuma-gazi girinmanw (\(CO_2\), \(H_2S\), \(SO_2\)) bɛ woyo ka jigin i n’a fɔ ji bɛ tɛmɛ kɔw fɛ, bajiw kɔnɔ, ani kɔw fɛ, k’a sɔrɔ fiɲɛ bɛ gazi ɲuman (\(SO_2\)) ni kɔgɔjida laminiw gɛrɛntɛ asidi klorokini lava haze (laze) fiɲɛ duguma. Aw kana a ɲini abada ka boli ka tɛmɛ gazi sankaba kan ni aw bɛ boli ka jigin kɔdingɛ sira kan: aw bɛ wuli ka wuli ka wuli ka wuli ka wuli ka wuli boon dɔ ka kulu, kulu walima sanfɛyɔrɔ la min ka surun aw la, gazi min bɛ ɲɔgɔn dalajɛ sanfɛ, ka wuli ka tilennen to fiɲɛ fan fɛ.
2. Aw ye dugukolo kɔlɔsi "Nature's Gas Detector" kama: kɔnɔ salenw, fɛnɲɛnama salenw, bagan salenw, walima mobili motɛri jɔlen barikama. Gazi ɲuman tɛ ye pewu, a kasa tɛ bɔ pewu. N’i bɛ taama walima ka bolifɛn ta tasuma-fanga kɛrɛfɛ, fumarole foro, walima crater lake kɛrɛfɛ, n’i barika banna ka kɔnɔw, sosow, sagaw, walima fɛnɲɛnama salenw ye minnu dalen bɛ duguma, taamasiyɛn si tɛ u la, walima n’i ka mobili jenilen motɛri barika banna ka sɔgɔsɔgɔ ani ka jɔ (bari \(CO_2\) ye oksizɛni fiɲɛ bila a nɔ na \(13\text{ to duguma }15\text{ kɛmɛsarada la}\) mago bɛ motɛri jeni na), i donna \(CO_2\) bɔrɔ fagalen dɔ kɔnɔ. Aw bɛ aw ninakili minɛ ka boli ka wuli o yɔrɔnin bɛɛ.
3. Aw kana da aw nu na abada "kɔnɔ tolilen" sulfure d’hydrogène (\(H_2S\)) gazi lamini na: kasa sɔgɔsɔgɔ bɛ kɛ segin kɔnɔ. Ni a hakɛ ka dɔgɔn, a tɛ kojugu kɛ (\(0.01\text{ ka se }10\text{ ppm}\)), sulfure hydrogène kasa ka bon i n’a fɔ kɔnɔ tolilenw. Nka, ni \(H_2S\) sera hakɛ la min bɛ se ka mɔgɔ ka ɲɛnamaya bila farati la (ka tɛmɛ \(100\text{ kan ka se }150\text{ ppm}\) ma), a bɛ kasa bɔ i nugu la seginkanni 2 fo 15 kɔnɔ, o bɛ kɛ sababu ye ka kasa tunun pewu o la i b’a miiri ko fiɲɛ bɔra. Ni aw ye kɔnɔ tolilen barikamaw kasa mɛn jisumayɔrɔ, bɔgɔdaga walima fumarole kɛrɛfɛ ani ni o kasa barika banna ka aw ɲɛw sɔgɔsɔgɔ walima ni aw ɲɛnamini bɛ aw la, aw bɛ wuli ka wuli fiɲɛ na o yɔrɔnin bɛɛ.
4. Aw bɛ ninakili ni fini ɲiginnen ye walima kamisɔn min sutura ni bikaribonati ye DƆRƆN ye asidi gaziw kama (\(SO_2\) ani \(HCl\) laze); aw k’a faamu ko fini walima filɛtiri masike si tɛ baara kɛ \(CO_2\) kan. Ni aw minɛna sankaba kɔnɔ min bɛ mɔgɔ sɔgɔ gazi ɲuman (\(SO_2\)) walima kɔgɔjida la asidi kloroki laze (\(HCl\)), aw bɛ aw nu ni da datugu ni fini ye min su ji la (walima min ka fisa, ji min ɲagaminen don soda [bikarbonati sodiyɔmu] kuyɛri kelen na, o min bɛ asidi neutralize gazi minnu bɛ ɲɔgɔn sɔrɔ) ani ka aw ɲɛw datugu ni aw bɛ se. Nka, aw k’aw hakili to a la ko fini ɲiginnen, N95 masike, walima P100 kemikɛli kariti ninakililan si tɛ se k’aw tanga Gazi ɲuman (\(CO_2\)) sɔgɔsɔgɔninjɛ ma: \(CO_2\) bɛ oksizɛni bɔ fiɲɛ na, o la, ka wuli ka taa sanfɛ fiɲɛ ɲuman na dɔrɔn walima ka oksizɛni/SCBA fiɲɛ fiyɛ buteli kɔnɔ, o dɔrɔn de bɛna aw to ɲɛnamaya la.
5. Aw bɛ tasuma-fanga-yɔrɔw labɔ joona ni kɔji ji bɛ wuli, ka kɛ bilen-bulu ye, walima ni a bɛ mankan bɔ (Limnic Eruption). Ni aw sigilen bɛ walima ni aw bɛ taa tasuma-fanga-yɔrɔ duman dɔ kɛrɛfɛ (maar kɔ) ani ka a kɔlɔsi ko ji jukɔrɔla mankan barikama dɔ bɛ kɛ, jiboli-yɔrɔ walima tsunami jikuru dɔ bɛ kɛ kɔ cɛmancɛ la fiɲɛ tɛ min na, walima ni kɔji bɛ wuli ka kɛ sankaba nɔgɔ-bɔgɔ ye (o bɛ sɔrɔ nɛgɛ jugumanba \(CO_2\)-ji falen fɛ min bɛ wuli ka taa sanfɛ), limnic eruption dɔ daminɛna. Gazi tɔni ba kɛmɛ caman minnu girinya ka bon ni fiɲɛ ye \(CO_2\), olu bɛna bɔn kɔdingɛ da la, ka boli ka jigin lamini bajida la ni kilomɛtɛrɛ 20 fo 50 ye lɛrɛ kɔnɔ (kilomɛtɛrɛ 12 fo 30 lɛrɛ kɔnɔ). Yɛlɛn **mɛtɛrɛ jɔlen 50 fo 100 la dɔgɔmannin (sen 165 fo 330) ka wuli kɔdingɛw kan o yɔrɔnin bɛɛ.
6. Aw bɛ oksizɛni walima CPR kɛ yɔrɔ jan na ani ka ɲɛ minnu jeni asidi la, aw bɛ olu ko ni ji sanuman ye miniti 15 kɔnɔ. Ni gazi bɛ mɔgɔ min na, o sera yɔrɔ jan na, fiɲɛ bɛ min na (aw kana don abada gazi bɔrɛ kɔnɔ min ka dɔgɔn ni SCBA tɛ), aw bɛ aw ka sigida kɔrɔtɔko nimɔrɔ wele (911 Ameriki ani Kanada, 112 Erɔpu tɔnba bɛɛ kɔnɔ, 999 Angletɛri, walima a bɛɛ lajɛ kɔrɔtɔko nimɔrɔw). Ni u hakili tɛ a la ani ni u tɛ ninakili ka ɲɛ, aw bɛ a daminɛ CPR (CPR) ye o yɔrɔnin bɛɛ (aw bɛ pocket mask walima bolo dɔrɔn degunni kɛ ni \(H_2S\) walima asidi gazi fiyɛra). Ni u bɛ sɔgɔsɔgɔ ka bɔ \(SO_2\), vog, walima laze fɛ, aw bɛ u dɛmɛ ka u ka albuterol/salbutamol bronchodilator inhaler sɛbɛnnen kɛ ani ka ɲɛ jenilenw ko ni ji sanuman ye miniti 15 kɔnɔ.

Tasuma-gazi, laze, ani limnic eruption survival decision tree¶

Aw bɛ baara kɛ ni nin foro triage flowchart ye walasa ka a dɔn tasuma gazi farati min bɛ aw ɲɛ ani ka ɲɛnamaya kɛcogo tigitigi kɛ.

flowchart TD
    Start["Tasuma / Dugukolonɔn / Crater Lake Gazi Kɔrɔtɔko:<br/>Fumarole foro, Kɔgɔjida lava Kɔgɔji Donda, walima Crater Lake"] --> HazardType{"I bɛ gazi walima plume<br/>lamini sugu jumɛn na?"}

    HazardType -->|"1. Kɔgɔjida la, Crater duguma, So duguma, Snow Pit,<br/>walima Crater Lake Turning Brown / Bubbling"| HeavyGas["CO2 min bɛ siga la (Limnic Eruption / Mazuku) WAALIMA H2S caman:<br/>1. AW KAN’aw biri walima ka don degun dɔgɔmanw na<br/>2. Aw bɛ ninakili minɛ ni kɔnɔw/baganw ɲɛnamini walima ni salenw ye<br/>3. Yɛlɛn YƆRƆBƆLI YƆRƆBƆLI (>= mɛtɛrɛ 30 fo 100 jɔlen)<br/> (Filɛrɛ masikiw & fini ɲiginnenw TƐ CO2 sɔgɔsɔgɔli dabila)"]

    HazardType -->|"2. ‘Burnt Match’ kasa min bɛ sɔgɔsɔgɔ kosɛbɛ,<br/>Ɲɛw/dawolo sɔgɔsɔgɔ, walima Hazy Vog Plume"| SO2Vog["SULFUR DIOXIDE (SO2) / VOLCANIC SMOG (VOG):<br/>1. Move UPHILL and CROSSWIND (90 degrees to wind)<br/>2. Breathe through wet cloth (ideally soaked in baking soda water)<br/>   or use P100 + Acid Gas cartridge respirator<br/>3. If indoors: Close all windows/doors, turn off A/C fresh-air intake,<br/>   and use asthma rescue inhaler if wheezing"]

    HazardType -->|"3. White Steam-Like Plume Where Molten Lava<br/>Enters Ocean Seawater"| LazePlume["ASIDI HYDROCHLORIC ‘LAZE’ (Lava Haze + Glass Shards):<br/>1. AW KAN’A jɔ abada fiɲɛ jukɔrɔ kɔgɔjida la lava dondaw la<br/>2. Aw bɛ taa teliya la UPWIND / CROSSWIND mɛtɛrɛ 500+ ni kɔ<br/>3. Aw kana ɲɛw magaya (Pele ka galasi sɔgɔlenw bɛ ɲɛkisɛw sɔgɔsɔgɔ)<br/>4. Aw bɛ ɲɛw ni fari ko ni ji sanuman caman ye miniti 15 kɔnɔ"]

    HeavyGas --> CasualtyCheck{"Has someone collapsed in the gas zone?"}
    SO2Vog --> CasualtyCheck
    LazePlume --> CasualtyCheck

    CasualtyCheck -->|"Casualty still inside low gas pit/depression"| WaitSCBA["STOP: Do NOT enter the low gas pocket without SCBA air tank<br/>(60% of confined-space/volcanic gas deaths are would-be rescuers)<br/>Call 911 / 112 / 999 for Fire Rescue SCBA extraction"]

    CasualtyCheck -->|"Casualty on ventilated high ground"| FirstAidHigh["1. Check breathing: Start CPR if unresponsive and not breathing<br/>2. Place unconscious breathing casualty in Lateral Recovery Position<br/>3. Flush eyes with plain water; give bronchodilator for SO2/Laze bronchospasm<br/>4. Monitor 24 to 48 hrs in hospital for Delayed Pulmonary Edema"]

Comparing the 5 lethal volcanic and crater-lake gas hazards¶

Every volcanic gas has a distinct molecular weight, smell, and killing mechanism. Use this USGS and IVHHN (International Volcanic Health Hazard Network) clinical table to distinguish them.

Deep dive 1: Limnic eruptions (Crater lake overturns) and "Mazuku" death pockets¶

A limnic eruption (also called a lake overturn) is one of the rarest and most terrifying natural disasters on Earth. In 1984 at Lake Monoun (killing 37 people) and on August 21, 1986 at Lake Nyos in Cameroon, a deep volcanic crater lake suddenly erupted without a drop of lava, releasing up to 300,000 to 1.6 million metric tons of pure dissolved carbon dioxide (\(CO_2\)) gas. A silent, invisible cloud of \(CO_2\) 50 meters (165 feet) thick spilled over the crater rim and flowed down the surrounding river valleys at 20 to 50 kilometers per hour (12 to 30 miles per hour), extinguishing every cooking fire, stalling vehicles, and silently suffocating 1,746 people and over 3,500 cattle in their sleep up to 25 kilometers (15 miles) away.

How a limnic eruption works (The "Champagne Bottle" Lake Mechanism)¶

1. Volcanic \(CO_2\) injection at the bottom of a deep, unmixed lake: Magma sitting kilometers beneath an extinct or dormant volcanic crater (maar) continuously leaks carbon dioxide gas up through the lake bed. In most temperate lakes, seasonal winter cooling causes the surface water to sink and mix the lake every year (holomictic lakes), releasing harmless small amounts of gas. However, in deep tropical lakes like Lake Nyos, Lake Monoun (Cameroon), and Lake Kivu ( located on the border of the Democratic Republic of the Congo and Rwanda, holding roughly \(300\text{ cubic kilometers}\) of dissolved \(CO_2\) and \(60\text{ cubic kilometers}\) of methane), the warm top layer of water never cools enough to sink (meromictic stratification).
2. Hydrostatic pressure traps the gas: At a depth of \(200\text{ to }400\text{ meters}\) (\(650\text{ to }1,300\text{ feet}\)), the immense weight of the upper water column (\(20\text{ to }40\text{ atmospheres}\) of pressure) keeps billions of liters of \(CO_2\) dissolved inside the cold bottom water, exactly like the cap on a pressurized bottle of champagne.
3. The Trigger and Runaway Exsolution: When a rockslide/landslide splashes into the lake, an earthquake shakes the basin, a sublacustrine volcanic vent heats the bottom, or a cold heavy rainstorm pushes surface water down, a parcel of deep \(CO_2\)-saturated water is lifted upward into shallower, lower-pressure zones. Instantly, microscopic bubbles of \(CO_2\) fizz out of solution (nucleation). Because gas-filled water is lighter (more buoyant) than liquid water, the fizzing column shoots toward the surface like an elevator, drawing up the entire deep layer of the lake in a runaway chain reaction that blasts a 50-to-100-meter-high fountain of water into the air and unleashes a massive, freezing-cold blanket of heavier-than-air \(CO_2\).

"Mazuku" (Swahili for "Evil Wind") and Dry Volcanic \(CO_2\) Traps Worldwide¶

You do not need a lake to be killed by volcanic \(CO_2\). Around Mount Nyiragongo (DR Congo), Mammoth Mountain (California, USA), Campi Flegrei / Solfatara and Mount Etna (Italy), Laacher See (Germany), Mount Gambier (Australia), Hakoné / Mount Aso (Japan), and Rotorua (New Zealand), invisible cold \(CO_2\) seeps straight out of soil fractures: - In East Africa, locals call these depressions Mazuku ("Evil Winds"): during the day, solar heat and wind disperse the gas, but at night, when the air cools and wind stops, pure \(CO_2\) fills sunken footpaths, caves, trenches, and low huts up to chest height. - In snowy volcanic mountains like Mammoth Mountain in California or Mount Rainier / Mount Hood / Japanese Alps, \(CO_2\) and \(H_2S\) accumulate underneath the winter snowpack and fill tree wells, snow caves, ski patrol huts, and buried cabin basements, suffocating skiers who fall headfirst into a tree well or dig a snow shelter near a fumarole.

Deep dive 2: Coastal "Laze" (Hydrochloric acid lava haze) vs. inland "Vog" (Volcanic smog)¶

Travelers and coastal residents in volcanic islands (such as Hawaii's Kīlauea, Iceland's Reykjanes Peninsula, La Palma in the Canary Islands, Stromboli/Etna in Italy, and Vanuatu/Indonesia) frequently confuse Laze and Vog:

1. How Coastal "Laze" (Lava Haze) Forms and Why It Is Not Steam¶

When incandescent basaltic lava at \(1,150^\circ\text{C}\) (\(2,100^\circ\text{F}\)) pours off a sea cliff into ocean seawater, it does not merely create harmless water steam. The extreme thermal shock triggers rapid chemical reactions (pyrohydrolysis) between molten silicate lava and dissolved magnesium chloride (\(MgCl_2\)) and sodium chloride (\(NaCl\)) sea salts, boiling off a dense, brilliant-white plume of concentrated hydrochloric acid (\(HCl\)) gas and acid rain droplets with a \(\text{pH of }1.5\text{ to }2.0\) (as corrosive as battery acid or pure stomach acid). - At the exact same moment, steam explosions shatter the chilling crust of molten lava into millions of microscopic, needle-sharp volcanic glass shards (including fragile spun-glass threads called Pele's hair and hollow glass flakes called limu o Pele). - Why you must NEVER rub your eyes in a laze plume: If a sea breeze shifts and blows the white laze plume over sightseers or a tour boat, the hydrochloric acid stings the eyes immediately, prompting people to rub their eyes with their hands. Rubbing grinds microscopic volcanic glass needles straight into the cornea, causing severe corneal ulcerations. Instead, flush the eyes continuously with pouring clean water or saline for 15 minutes before touching the eyelids.

2. How Inland "Vog" (Volcanic Smog) Triggers Life-Threatening Asthma Crises¶

Vog forms when sulfur dioxide (\(SO_2\)) gas emitted from a volcanic vent reacts chemically in the atmosphere with oxygen, moisture, and sunlight over hours to days, converting into a hazy aerosol mist of sulfuric acid (\(H_2SO_4\)) droplets and microscopic ammonium sulfate particles (\(PM_{2.5}\), smaller than \(2.5\text{ micrometers}\)). - Because \(PM_{2.5}\) acid sulfate particles are microscopic, they bypass the nose's natural filtration system and penetrate straight into the deepest alveoli and bronchioles of the lungs. - In people with asthma, COPD, chronic bronchitis, heart disease, infants, and pregnant women, even low concentrations of \(SO_2\) (\(0.5\text{ to }5\text{ ppm}\)) and vog trigger immediate, violent reflex bronchoconstriction (airway clamping shut). - Indoor Shelter-in-Place Protocol for Vog / \(SO_2\): If a heavy vog or \(SO_2\) plume blows over your neighborhood and you cannot evacuate crosswind, go indoors, close and tape all windows and doors, set your air conditioner to Recirculate / Indoor Air (closing the outside fresh-air damper), run a HEPA air purifier equipped with an activated carbon / potassium permanganate or baking-soda chemical filter, or hang damp sheets sprayed with a solution of baking soda and water (\(2\text{ tablespoons}\) baking soda per liter of water) in front of a box fan to scrub acid aerosols from the room air.

Concentration-by-concentration physiological thresholds for \(CO_2\), \(H_2S\), and \(SO_2\)¶

Understanding how rapidly symptoms escalate as gas concentrations climb explains why waiting even 60 seconds in a volcanic depression can be fatal (data compiled from NIOSH, OSHA, and USGS Volcano Hazards Program):

Protecting drinking water, livestock, and skin from Hydrogen Fluoride (\(HF\)) and acid rain¶

When an active volcano degasses or erupts fine ash, hydrogen fluoride (\(HF\)) and sulfur dioxide (\(SO_2\)) condense onto falling ash particles and rain droplets: 1. Disconnect Rooftop Rainwater Cisterns Immediately: If your household relies on rooftop rainwater harvesting tanks, disconnect the gutter downspouts from your storage tank before the gas or ash plume arrives. Acid rain and fluoride-coated ash washed off a roof can turn cistern water toxic (causing acute fluoride poisoning, severe vomiting, and hypocalcemic cardiac arrhythmias). 2. Protect Livestock and Pets: Grazing animals (especially sheep, cattle, horses, and goats) ingest toxic doses of fluorine when eating grass dusted with \(HF\)-coated volcanic ash or drinking from shallow puddles, developing fatal acute fluorosis within hours. Bring livestock into covered barns and feed them stored clean hay and covered water.

Ɲininkali minnu bɛ kɛ tuma caman na¶

Sosow sɛgɛsɛgɛra¶

• United States Geological Survey (USGS) Volcano Hazards Program: Volcanic Gases and Their Effects (\(CO_2\), \(SO_2\), \(H_2S\), \(HF\), and Coastal Hydrochloric Acid Laze), including Mammoth Mountain Tree-Well/Snow-Pit \(CO_2\) Hazard Advisories and Kīlauea Vog/Laze Protocols.
• International Volcanic Health Hazard Network (IVHHN), World Health Organization (WHO), and British Geological Survey (BGS): Guidelines on Preparedness Before, During, and After Exposure to Volcanic Gas, Acid Rain, Vog, and Laze.
• Centers for Disease Control and Prevention (CDC / NIOSH, United States) and Occupational Safety and Health Administration (OSHA, United States): Immediately Dangerous to Life or Health (IDLH) Concentrations and Pocket Guide to Chemical Hazards for Carbon Dioxide (\(CO_2\)), Hydrogen Sulfide (\(H_2S\)), Sulfur Dioxide (\(SO_2\)), Hydrogen Chloride (\(HCl\)), and Hydrogen Fluoride (\(HF\)).
• United Nations Office for the Coordination of Humanitarian Affairs (OCHA) and Goma Volcano Observatory (OVG): Mazuku (Dry Carbon Dioxide Pocket) and Lake Kivu / Lake Nyos Limnic Eruption Early Warning and High-Ground Evacuation Standards.

Gafe minnu bɛ tali kɛ o ko la¶

• Volcanoes: ashfall, pyroclastic flows, and lahars
• Wildfire smoke and ash inhalation
• Asthma attack emergency first aid
• Eye injuries and chemical flushing
• CPR: cardiopulmonary resuscitation steps