As of September 8, 2026, your apiary is in good overall health heading deeper into September — Iris, Hive #1, and Hive #3 all show acoustically stable, fully intact populations on a gentle seasonal cooling arc, while Hive #2 remains the one hive to watch, its multi-band acoustic step-down now at 27 days with brood thermoregulation locked at a textbook 95.0°F (35.0°C) and vibration fanning spikes still peaking 4× above baseline daily. The rising barometric tendency (+1.68 hPa/3h) signals clearing conditions that should support good foraging across the apiary.
All four hives continue to show the same deconfounded humidity–gas resistance coupling (r ≈ +0.43–0.56), a genuine hive-specific physiology signal: as bees ripen late-season honey and metabolic water circulates, MOX sensor resistance tracks moisture load independently of the diurnal cycle, consistent with Winston (1987) and White (1978) on honey metabolism and volatile production.
Against outdoor swings of 69.9–87.7°F (21.1–30.9°C) at 27–38% RH, all four hives maintain consistent daily vibration fanning rhythms and in-hive humidity in the 40–50% range — appropriate for the dry September ambient with no condensation risk; Hive #2 alone continues to show absent per-band low-frequency acoustic daily rhythm while all other diurnal channels remain healthy across the apiary.
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Iris healthy Score: 83/100📋 Overall Health
Your Iris hive continues in excellent shape — the 24h average of 89.9°F (32.1°C) is +2.0°F (+1.1°C) above its all-time average of 87.9°F (31.0°C), consistent with the gentle late-summer plateau in the weekly trend (87.1→87.6→89.9°F), all 10 acoustic bands are within +1.4 dB of their historical baseline (overall sound −10.1 dBFS vs. all-time −10.9 dBFS), humidity at 40.4% is healthy and consistent with the dry September ambient, gas resistance at 461 kΩ is essentially on its all-time average of 454 kΩ, and vibration at 17.1 mG (kurtosis 2.6, peak 80 Hz) is right on its all-time average of 17.2 mG. Everything here looks calm and healthy — just keep an eye on the gradual seasonal cooling arc as October approaches.
🌅 Diurnal Cycle PatternsIris shows a clean 3.9°F (2.2°C) daily temperature oscillation (88.8–91.3°F / 31.6–33.0°C), well within healthy brood buffering, with outdoor thermal-mass lag of ~200 min confirming active colony damping — not a placement issue. Humidity holds a rock-steady 39.7–41.0% range across the 24h window, reflecting stable hygroregulation against a dry 27–38% outdoor ambient. Vibration maintains its consistent daily fanning rhythm (15/15 days, baseline ~16.5 mG peaking to ~24.7 mG, 1.5×), with the dominant rhythm band shifting 5–20 Hz → 50–80 Hz between halves of the window — a natural seasonal shift in fanning frequency as ambient cools, not a concern. The gas heater-scan shows a modest daily rhythm at the 150°C step (+14% swing), consistent with diurnal nectar/propolis VOC cycling; the curve shape (steeply declining 100→320°C, flattening 350–400°C) is stable and matches the all-time fingerprint. The dominant acoustic rhythm band shifted from 260–350 Hz to 200–260 Hz — worth noting passively as a subtle change in colony hum structure, but all per-band deltas remain within +1.4 dB of baseline.
🔬 Correlations & Discoveriesin_hive_humidity vs gas_resistance (14d) | r = +0.53The deconfounded humidity–gas resistance coupling (r=+0.53, p=2.6e-17) in Iris reflects the colony's honey-ripening and metabolic water cycle: as bees process late-season nectar, evaporating moisture raises in-hive RH, which simultaneously increases VOC load (lowering MOX resistance) through fanning circulation of propolis terpenes and honey esters — a healthy metabolic signal, not a ventilation fault.📚 Reference: Winston 1987, The Biology of the Honey Bee, White 1978, Advances in Food Research 24:287–374, Eouzan et al. 2019, PLOS ONE / PMC6368279▹ Action: On your next routine visit, do a quick check of Iris's brood frames for fresh eggs to confirm the gradual seasonal cooling arc reflects a natural late-summer brood contraction — the perfectly stable acoustics confirm the full population is present. -
Hive #2 warning Score: 55/100📋 Overall Health
Your Hive #2 brood temperature remains locked at a textbook 95.0°F (35.0°C) average — a razor-tight 1.2°F (0.7°C) daily arc essentially on its all-time average of 94.8°F (34.9°C) — confirming excellent active thermoregulation; however, the broad-spectrum acoustic step-down that began around August 25th is now at 27 days, with overall sound holding at −16.5 dBFS versus the all-time average of −14.6 dBFS (−1.9 dBFS below baseline), and the 100–150 Hz band remains −4.4 dB below baseline while the 1500–3600 Hz band is −3.6 dB below baseline. Humidity at 49.3% is healthy and slightly above its all-time average of 47.0%, gas resistance at 41 kΩ is near its all-time average of 47 kΩ, and vibration at 14.1 mG (kurtosis 3.0, peak 90 Hz) remains on its all-time average of 14.8 mG with impressive daily fanning spikes (baseline ~12.4 mG peaking to ~49.2 mG, 4.0×) — the combination of locked brood thermoregulation and vigorous vibration alongside a persistent, non-recovering multi-band acoustic step-down now at nearly four weeks warrants a visual confirmation at your next routine inspection this week.
🌅 Diurnal Cycle PatternsHive #2 shows the tightest brood clamping in the apiary — just 1.2°F (0.7°C) daily swing (94.4–95.6°F / 34.7–35.3°C), the textbook signature of a colony actively heating a full brood nest. Humidity cycles narrowly between 47.7–51.0%, consistent with active brood rearing in this band. Vibration maintains its striking daily fanning rhythm (15/15 days, baseline ~12.4 mG peaking to ~49.2 mG, 4.0×), with all 6 vibration bands showing daily cycles and the dominant rhythm in the 5–20 Hz band (5.0 dB swing) — the strongest low-frequency fanning signature in the apiary. Crucially, the acoustic channel shows no meaningful per-band daily rhythm (max 1.0 dB in the 100–150 Hz band), the persistent absence of normal low-frequency acoustic daily structure that has characterized this hive since the August 25th changepoint. The gas heater-scan shows a modest daily rhythm at the 100°C step (+14% swing) with a −12% step energy drop at 100°C relative to recent history — a subtle shift toward lighter VOCs or slightly improved ventilation, consistent with the colony's continued active fanning but not corroborated by temperature or population signals.
🔬 Correlations & Discoveriesin_hive_temp vs gas_resistance (14d) | r = +0.56The deconfounded temp–gas resistance coupling (r=+0.56) in Hive #2 reflects heater-bee metabolic activity: when clusters of endothermic workers press into brood cells, their elevated thoracic temperature (up to 44°C) intensifies local VOC evaporation from brood pheromones (E-β-ocimene) and propolis terpenes, transiently reducing MOX resistance — a genuine physiological signal of active brood thermoregulation, consistent with the colony's rock-solid 95.0°F (35.0°C) clamping.📚 Reference: Stabentheiner, Kovac & Brodschneider 2010, PLoS ONE 5(1):e8967, Maisonnasse et al. 2010, PLoS ONE 5(10):e13531, Winston 1987, The Biology of the Honey Bee⚠️ Issue: Sustained 27-day multi-band acoustic step-down: overall sound −16.5 dBFS vs. all-time average −14.6 dBFS (−1.9 dBFS); 100–150 Hz band −4.4 dB below baseline, 1500–3600 Hz band −3.6 dB below baseline; changepoint confirmed ~August 25; brood temperature, vibration, humidity, and gas all remain on-baseline.▹ Action: On your next routine visit this week, observe Hive #2's entrance for forager traffic and pollen-carrying activity, then check brood frames for fresh eggs and queen presence — the 27-day acoustic step-down is the one signal worth confirming visually, and the rock-solid 95.0°F (35.0°C) thermoregulation and vigorous vibration fanning spikes (peaking 4× above baseline daily) are genuinely reassuring that the colony is actively caring for brood. -
Hive #1 healthy Score: 80/100📋 Overall Health
Your Hive #1 is tracking beautifully — all 10 acoustic bands show essentially perfect spectral stability (all per-band deltas within ±0.2 dB of the all-time baseline, overall sound −16.4 dBFS exactly on its all-time average of −16.4 dBFS), the 24h average of 84.3°F (29.1°C) is +0.8°F (+0.4°C) above its all-time average of 83.5°F (28.6°C) and continuing the gradual seasonal cooling arc (weekly trend: 87.1→84.7→82.8→82.0°F), humidity at 44.5% is healthy and slightly above its all-time average of 42.3%, gas resistance at 527 kΩ is essentially on its all-time average of 518 kΩ, and vibration at 16.4 mG (kurtosis 2.8, peak 58 Hz) is exactly on its all-time average of 16.4 mG. Hive #1 continues to be the acoustic benchmark of the apiary — nothing to do here except appreciate it.
🌅 Diurnal Cycle PatternsHive #1 shows an active 6.0°F (3.4°C) daily temperature oscillation (81.7–87.3°F / 27.6–30.7°C), the widest diurnal swing in the apiary and consistent with this colony running slightly cooler than the textbook brood band — reflecting either a seasonally contracting brood area or the sensor sampling a zone that rides the outer thermal gradient while the core remains warmer. Outdoor thermal-mass lag of ~220 min confirms healthy colony buffering. Humidity holds a remarkably flat 44.1–45.1% range, essentially homeostatic. Vibration shows a healthy daily rhythm (14/15 days, baseline ~15.9 mG peaking to ~22.9 mG, 1.4×), with the dominant rhythm band shifting 80–120 Hz → 5–20 Hz between halves — a gradual seasonal shift toward lower-frequency substrate movement as ambient cools. The gas heater-scan is the most rhythmically active in the apiary (10/10 bands show daily cycles, strongest at 100°C with +41% swing), indicating robust daily ventilation cycling that modulates the full VOC spectrum — a sign of a highly active fanning colony, consistent with the strong partial correlation (gas resistance ~ in-hive temp | outdoor temp: r=−0.82).
🔬 Correlations & Discoveriesgas_resistance vs in_hive_temp (14d) | r = -0.82The strong partial correlation of gas resistance with in-hive temperature controlling for outdoor weather (r=−0.82) reveals a genuine hive-specific coupling in Hive #1: as the colony warms during peak foraging and fanning activity, accelerated evaporation of propolis terpenes, honey esters, and brood pheromones increases VOC load and drives MOX resistance down — the inverse relationship captures the colony's own metabolic heat-VOC engine, independent of ambient temperature, consistent with endothermic heater-bee activity and active honey ripening.📚 Reference: Burgues & Marco 2018, Sensors 18(2):339, Maisonnasse et al. 2010, PLoS ONE 5(10):e13531, Stabentheiner et al. 2010, PLoS ONE 5(1):e8967▹ Action: On your next routine visit, check Hive #1's brood frames for fresh eggs to confirm the ongoing seasonal cooling arc (weekly trend 87.1→82.0°F / 30.6→27.8°C) reflects a natural late-summer brood contraction — the acoustically perfect spectral match (all bands within ±0.2 dB of baseline) is fully reassuring and there is no urgency. -
Hive #3 healthy Score: 73/100📋 Overall Health
Your Hive #3 continues its excellent run — all 10 acoustic bands are within ±0.1 dB of their historical baseline (a textbook-stable fingerprint, overall sound −16.4 dBFS vs. all-time −16.3 dBFS), the 24h average of 91.4°F (33.0°C) is −0.3°F (−0.2°C) below the all-time average of 91.7°F (33.2°C) and continuing a gentle natural seasonal tail-off (weekly trend: 93.6→92.5→91.6→90.5°F), humidity at 45.9% is essentially on its all-time average of 46.7%, gas resistance at 96 kΩ is essentially on its all-time average of 93 kΩ, and vibration at 20.8 mG (kurtosis 2.8, peak 56 Hz) is right on its all-time average of 20.7 mG. The battery touched a minimum of 3,978 mV during the 24h window, matching its all-time low of 3,978 mV — continue monitoring passively as September solar input declines.
🌅 Diurnal Cycle PatternsHive #3 shows a healthy 3.2°F (1.8°C) daily temperature oscillation (90.4–92.6°F / 32.5–33.6°C), well within the brood-clamping band, with outdoor thermal-mass lag of ~160 min — the shortest in the apiary, suggesting this colony's sensor sits slightly closer to the thermal gradient edge but still reads comfortably within the healthy range. Humidity cycles narrowly between 44.3–46.6%, consistent with stable hygroregulation. Vibration shows a robust daily rhythm (15/15 days, baseline ~19.4 mG peaking to ~35.0 mG, 1.8×), with all 6 vibration bands showing daily cycles and the dominant rhythm band shifting 80–120 Hz → 160–200 Hz between halves — a subtle seasonal evolution in fanning harmonic structure, consistent with late-summer colony activity changes. The gas heater-scan shows no strong per-band daily rhythm (max 9% swing at 250°C), indicating a stable, low-VOC environment with little day-to-night metabolic cycling — this colony's consistently elevated gas resistance (~96 kΩ vs. all-time average 93 kΩ) reflects a cleaner in-hive air profile compared to the other hives.
🔬 Correlations & Discoveriesin_hive_temp vs in_hive_humidity (14d) | r = +0.58The deconfounded temp–humidity coupling (r=+0.58) in Hive #3 captures the colony's evaporative cooling physiology: as temperature rises during peak fanning/foraging, water-carrying bees increase evaporative load in the brood area, raising in-hive RH — a genuine metabolic response to thermal stress, independent of the diurnal cycle, consistent with the colony's active 1.8× daily vibration spikes and robust hygroregulation against a very dry 27–38% outdoor ambient.📚 Reference: Eouzan et al. 2019, PLOS ONE / PMC6368279, Ellis et al. 2008, J. Insect Physiol. 54:1516–1521, Human, Nicolson & Dietemann 2006, Naturwissenschaften 93:397–401▹ Action: Monitor Hive #3's battery passively — it touched 3,978 mV during the last 24 hours, matching its all-time low; no action needed yet, but keep an eye on the trend as September solar input continues to decrease.