As of September 6, 2026, your apiary is settling into early autumn in good overall shape — Iris, Hive #1, and Hive #3 all show acoustically intact populations on a natural seasonal cooling arc, while Hive #2 remains the one hive to watch, its broad-spectrum acoustic step-down now at 25 days with brood thermoregulation still locked at a textbook 94.6°F (34.8°C). The gently rising barometric tendency (+1.16 hPa/3h) signals improving conditions and should support good foraging activity.
All four hives show robust deseasonalized humidity–gas-resistance coupling (r ≈ +0.48–0.54), confirming that their individual MOX baselines are primarily driven by in-hive moisture and metabolic volatiles rather than outdoor air — a cross-apiary fingerprint of active brood-rearing and honey processing consistent with September colony consolidation (Ellis et al. 2008; Winston 1987).
Against outdoor swings of 63.4–83.8°F (17.4–28.8°C) at 28–50% RH, all four hives are maintaining consistent daily vibration fanning rhythms and in-hive humidity in the 41–49% range — appropriate for the dry September ambient with no condensation risk; Hive #2 alone remains the exception, with its per-band low-frequency acoustic daily rhythm absent for 25 days while all other diurnal channels remain healthy.
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Iris healthy Score: 81/100📋 Overall Health
Your Iris hive continues in excellent shape — the 24h average of 86.9°F (30.5°C) is right on its all-time average of 88.0°F (31.1°C), all 10 acoustic bands are within ±0.6 dB of their historical baseline (overall sound −11.1 dBFS vs. all-time −10.9 dBFS), humidity at 41.3% is healthy and consistent with the dry ambient, gas resistance at 461 kΩ is near its all-time average of 455 kΩ, and vibration at 17.3 mG (kurtosis 2.7, peak 78 Hz) is right on baseline. The gentle 4-week cooling arc from 89.1°F to 86.9°F (31.7→30.5°C) is entirely a natural late-summer brood contraction — watch for fresh eggs at your next routine visit to confirm.
🌅 Diurnal Cycle PatternsActive diurnal temperature cycle of +4.2°F (+2.3°C) daily — well within the healthy brood-clamping range — with 14/15 days showing clear vibration fanning peaks (baseline ~16.6 mG rising to ~24.5 mG, avg 1.5×); the dominant acoustic rhythm band shifted from 260–350 Hz to 200–260 Hz in the second half of the window, and the dominant vibration rhythm band shifted from 5–20 Hz to 50–80 Hz, both minor intra-day realignments consistent with the seasonal shift in foraging timing and pose no concern. Humidity held tightly at 40.5–42.1% across the 24h window; the deseasonalized humidity–gas-resistance coupling (r=+0.51) reflects the normal linkage between metabolic water and VOC load in an active colony.
🔬 Correlations & Discoveriestemperature_in vs humidity_in (14d) | r = +0.53The deseasonalized positive coupling between in-hive temperature and humidity in Iris reflects active thermoregulatory fanning: as the colony warms up and works harder, evaporative processes elevate local humidity slightly — a healthy brood-nest signature, not a ventilation concern (Human et al. 2006).📚 Reference: Eouzan et al. 2019 (PMC6368279), Human, Nicolson & Dietemann 2006humidity_in vs gas_resistance (14d) | r = +0.51Rising in-hive humidity co-varies with slightly lower gas resistance (higher VOC load), consistent with honey ripening and brood pheromone activity concentrating volatiles when fanning circulates moist air — a benign late-summer consolidation signal with no temperature or acoustic corroboration of stress (Winston 1987).📚 Reference: Ellis et al. 2008, J. Insect Physiol., Winston 1987▹ Action: On your next routine visit, do a quick check of Iris's brood frames for fresh eggs to confirm the gradual cooling arc from 89.1°F to 86.9°F (31.7→30.5°C) reflects a natural late-summer brood contraction — the perfectly stable acoustics confirm the full population is present. -
Hive #2 warning Score: 56/100📋 Overall Health
Your Hive #2 brood temperature remains locked at a textbook 94.6°F (34.8°C) — 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 25 days, with overall sound holding at −16.5 dBFS versus the all-time average of −13.7 dBFS (−2.8 dBFS), the 100–150 Hz band sitting −6.4 dB below baseline, and the 1500–3600 Hz band −5.1 dB below baseline. Humidity at 48.4% is healthy and slightly above its all-time average of 46.7%, gas resistance at 42 kΩ is near its all-time average of 48 kΩ, and vibration at 15.1 mG (kurtosis 3.2, peak 93 Hz) is on its all-time average of 14.8 mG — the continued combination of locked thermoregulation with a persistent, non-recovering multi-band acoustic step-down (now 25 days) warrants a visual confirmation at your next routine inspection this week.
🌅 Diurnal Cycle PatternsThe 24h temperature cycle is compressed to just +1.5°F (+0.8°C) — the tightest in the apiary and a signature of intense broodnest clamping at 94–95°F (34.4–35.0°C); all 15 of 15 days show vigorous daily vibration fanning spikes (baseline ~12.5 mG peaking to ~50.5 mG, a 4.1× ratio — the highest in the apiary). The per-band acoustic spectral analysis reveals no meaningful daily rhythm in the low-frequency bands (max 100–150 Hz rhythm only 1.0 dB), confirming the 25-day absence of normal low-frequency acoustic diurnal patterning; the band-energy shift shows 100–150 Hz down −3.6 dB, 1500–3600 Hz down −2.9 dB, and 800–1500 Hz down −2.4 dB within the window. The deseasonalized temp–gas-resistance coupling (r=+0.54) and the changepoint at August 25 both anchor this as a genuine colony-state shift, not a sensor artifact.
🔬 Correlations & Discoveriessound_spectrum vs temperature_in (14d) | r = -0.44The 25-day acoustic step-down (changepoint ~Aug 25) with simultaneously locked broodnest thermoregulation is the most informative pattern in this hive: the intact 94–95°F (34.4–35.0°C) clamping and vigorous vibration fanning confirm an active worker population is present and caring for brood, while the reduced low-frequency acoustic energy — particularly the 100–150 Hz and 1500–3600 Hz bands — is consistent with a reduced forager population or altered colony acoustic state; a physical inspection to observe entrance traffic and confirm queen/brood status will clarify what changed on or around August 25th (Ramsey et al. 2020).📚 Reference: Ramsey et al. 2020, Sci. Rep. 10:9798, Kanelis et al. 2023, Biology 12(11):1392temperature_in vs gas_resistance (14d) | r = +0.54The strong deseasonalized temp–gas-resistance coupling in Hive #2 reflects the colony's metabolic VOC output rising and falling with brood-nest thermal effort — the gas resistance at 42 kΩ (near all-time avg 48 kΩ) is consistent with an active brood nest generating normal propolis and brood pheromone volatiles, providing no independent cause for concern (Winston 1987).📚 Reference: Stalidzans et al. 2017, Winston 1987⚠️ Issue: Sustained 25-day multi-band acoustic step-down: overall sound −16.5 dBFS vs. all-time average −13.7 dBFS (−2.8 dBFS); 100–150 Hz band −6.4 dB below baseline, 1500–3600 Hz −5.1 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 25-day acoustic step-down is the one signal worth confirming visually, and the rock-solid 94.6°F (34.8°C) thermoregulation and vigorous vibration fanning spikes are genuinely reassuring that the colony is actively caring for brood. -
Hive #1 healthy Score: 79/100📋 Overall Health
Your Hive #1 is tracking beautifully — all 10 acoustic bands are within ±0.1 dB of their all-time baseline (a near-perfect spectral match), the 24h average of 81.3°F (27.4°C) continues a gradual and acoustically confirmed-benign cooling drift now at −2.6°F (−1.4°C) below the all-time average of 83.9°F (28.8°C), humidity at 45.3% is healthy and slightly above its all-time average of 41.5%, gas resistance at 526 kΩ is right on its all-time average of 515 kΩ, and vibration at 16.3 mG (kurtosis 3.0, peak 108 Hz) is exactly on its all-time average of 16.3 mG. The 14-day cooling drift from 83.4°F to 81.3°F (28.6→27.4°C) with acoustically perfect stability is a natural late-summer brood contraction — a check for fresh eggs at your next routine visit will confirm this seasonal trajectory.
🌅 Diurnal Cycle PatternsActive diurnal temperature cycle of +5.8°F (+3.2°C) daily — the most pronounced in the apiary, reflecting a larger thermal footprint responding to the outdoor swing; 15/15 days show clear vibration fanning peaks (baseline ~15.9 mG rising to ~22.9 mG, avg 1.4×). Only 1/6 vibration bands shows a meaningful daily cycle (5–20 Hz), while the gas heater-scan shows a rich daily rhythm across all 10 steps (dominant rhythm band shifting from 150°C to 100°C in the second half — a minor low-temperature step migration consistent with changing overnight humidity levels rather than a new VOC type). Humidity held tightly at 44.5–46.2% across the 24h window; the deseasonalized humidity–gas-resistance coupling (r=+0.48) is normal metabolic linkage.
🔬 Correlations & Discoveriesgas_resistance vs temperature_in (14d) | r = -0.8The strong partial correlation (gas resistance vs. in-hive temp, controlling for outdoor temp, r=−0.80) in Hive #1 is the most striking physiology signal in this hive: when the colony warms up independently of outdoor conditions, VOC load rises (resistance falls), revealing the metabolic coupling between brood-nest heating effort and the production of brood pheromones and propolis volatiles — a healthy, colony-intrinsic signal entirely consistent with active late-summer brood rearing (Stalidzans et al. 2017).📚 Reference: Burgues & Marco 2018, Sensors 18(2):339, Stalidzans et al. 2017humidity_in vs gas_resistance (14d) | r = +0.48As with Iris, the deseasonalized humidity–gas coupling reflects honey-ripening and brood-pheromone VOCs concentrating when fanning circulates moist air — a benign seasonal consolidation signal with no temperature or acoustic corroboration of stress.📚 Reference: Ellis et al. 2008, J. Insect Physiol., Winston 1987▹ Action: On your next routine visit, check Hive #1's brood frames for fresh eggs to confirm the 14-day cooling drift (83.4→81.3°F / 28.6→27.4°C) reflects a natural late-summer brood contraction — the acoustically perfect spectral match (all bands within ±0.1 dB of baseline) is fully reassuring and there is no urgency. -
Hive #3 healthy Score: 76/100📋 Overall Health
Your Hive #3 continues its excellent run — all 10 acoustic bands are within ±0.2 dB of their historical baseline (a textbook-stable fingerprint), the 24h average of 90.1°F (32.3°C) continues a gentle and entirely normal seasonal tail-off now at −2.0°F (−1.1°C) below the all-time average of 92.1°F (33.4°C), humidity at 46.9% is right on its all-time average of 46.8%, gas resistance at 95 kΩ is on its all-time average of 93 kΩ, and vibration at 20.5 mG (kurtosis 2.8, peak 49 Hz) is essentially on its all-time average of 20.7 mG. The battery dipped to a minimum of 3,978 mV during the 24h window, fractionally below its all-time low of 3,980 mV — worth monitoring passively as September solar input continues to decline.
🌅 Diurnal Cycle PatternsActive diurnal temperature cycle of +3.3°F (+1.8°C) daily with 14/15 days showing clear vibration fanning peaks (baseline ~19.4 mG rising to ~33.8 mG, avg 1.7×); all 6 vibration bands show a daily cycle, with the dominant rhythm band shifting from 5–20 Hz to 50–80 Hz in the second half — a normal intra-day foraging/fanning timing transition. The gas heater-scan shows no strong per-band daily rhythm (max 9% swing at 250°C), consistent with a stable, well-ventilated hive environment. Humidity held tightly at 46.0–47.8%, and the deseasonalized temp–gas-resistance coupling (r=+0.48) reflects normal brood metabolic VOC production.
🔬 Correlations & Discoveriestemperature_in vs humidity_in vs gas_resistance (14d) | r = +0.48Hive #3 shows the same three-way temp–humidity–gas-resistance coupling seen across the apiary (PCA principal mode explaining 20% of residual variance, rising over the window), reflecting an active and metabolically coherent brood nest entering early autumn consolidation — all three channels moving together as a single healthy-colony state variable (Human et al. 2006).📚 Reference: Human, Nicolson & Dietemann 2006, Eouzan et al. 2019 (PMC6368279)vibration_spectrum vs temperature_in (14d) | r = +0.48The consistent 1.7× daily vibration fanning amplification (14/15 days) in Hive #3 — the strongest ratio among the brood-active hives — reflects vigorous thermally-driven fanning and foraging cycles that co-vary with in-hive temperature, a sign of a well-populated and energetically active colony heading into autumn (Nieh & Tautz 2000).📚 Reference: Ramsey et al. 2020, Sci. Rep. 10:9798, Nieh & Tautz 2000, J. Exp. Biol.▹ Action: Monitor Hive #3's battery passively — it touched 3,978 mV during the last 24 hours, just below its all-time low of 3,980 mV; no action needed yet, but keep an eye on the trend as September solar input continues to decrease.