🌫️ AQI SCALE
0–50 GoodSafe outdoor
51–100 ModerateSensitive groups
101–150 Unhealthy (Sens.)Limit outdoor
151–200 UnhealthyEveryone affected
201–300 Very UnhealthyHealth alert
300+ HazardousEmergency
💨 POLLUTANTS
PM2.5Tiny particles <2.5µm
PM10Dust <10µm
O₃Ground-level ozone
NO₂Traffic pollution
SO₂Coal burning
COCarbon monoxide
🌐 EARTHQUAKE MAGNITUDE
M<3Barely felt
M3–4Light shaking
M4–5Moderate
M5–6Strong, damaging
M6–7Severe
M7+Major / Great
🌀 TYPHOON CATEGORIES (China)
Tropical Depression<62 km/h
Tropical Storm63–87 km/h
Severe Tropical Storm88–117 km/h
Typhoon118–149 km/h
Severe Typhoon150–183 km/h
Super Typhoon>184 km/h
🌊 RIVER DISCHARGE
m³/scubic meters/second
BankfullNormal max flow
Flood level2× bankfull
Extreme>5× bankfull
GloFASEU flood model
SourceOpen-Meteo + CMA
🔥 FIRE RADIATIVE POWER
FRP <10 MWAgricultural burn
FRP 10–50 MWModerate wildfire
FRP 50–200 MWLarge wildfire
FRP >200 MWExtreme behavior
SourceNASA FIRMS VIIRS