As of September 14, 2026, your apiary is in good overall shape heading into mid-September — Iris, Hive #1, and Hive #3 are all acoustically stable and on or near their historical baselines, while Hive #2 continues the same reassuring split it has shown for nearly three weeks: textbook brood thermoregulation at 94.8°F (34.9°C) with vigorous daily fanning spikes, but a persistent multi-band acoustic step-down that now warrants a visual entrance and brood check this week. Outdoor air remains exceptionally clean (gas resistance ~993 kΩ, outdoor humidity 18–36%) with a steady barometric tendency, providing a favorable September foraging backdrop.
Across all four hives, the deseasonalized temp–humidity coupling (r = +0.42 to +0.89) reflects active hygroregulation: as each colony heats its brood zone, the psychrometric relationship causes in-hive RH to track temperature even under the very dry September ambient (outdoor RH 18–36%), confirming that colonies are maintaining their internal microclimate independently of outside conditions (Eouzan et al. 2019; Human et al. 2006).
All four hives maintain consistent daily vibration fanning rhythms dominated by the 80–120 Hz band, with in-hive humidity held in the 39–47% range — appropriate given the very dry September ambient. Hive #2 remains the most tightly clamped thermally (±2.0°F / ±1.1°C daily arc), Hive #3 at ±2.8°F (±1.6°C), Iris at ±4.6°F (±2.6°C), and Hive #1 continues to show the widest swing at ±8.2°F (±4.7°C) — all within normal September parameters for their respective placements and consistent with yesterday's patterns.
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Iris healthy Score: 87/100📋 Overall Health
Your Iris hive continues in excellent shape — the 24h average of 89.6°F (32.0°C) is +1.8°F (+1.0°C) above its all-time average of 87.8°F (31.0°C), all 10 acoustic bands remain within ±0.7 dB of their historical baseline (overall −10.9 dBFS exactly matching the all-time average), humidity at 38.7% is stable and consistent with the dry September ambient, gas resistance at 454 kΩ is right on its all-time average of 461 kΩ, and vibration at 17.3 mG (kurtosis 2.9, peak 108 Hz) is on its all-time average of 17.3 mG. Watch for the gentle warming arc to plateau as September progresses — a routine brood-frame check on your next visit remains the right cadence.
🌅 Diurnal Cycle PatternsIris shows a clear 24h temperature arc of 87.7–92.3°F (30.9–33.5°C), a ±4.6°F (±2.6°C) daily swing well within healthy bounds, with the deseasonalized analytics confirming this in/out coupling is purely ambient buffering (raw r=+0.53, deconfounded r=+0.09, outdoor leads by ~180 min) — a sign of active thermal-mass damping, not sensor placement. The acoustic spectrum shows a modest second-half-of-day uptick in the 150–260 Hz bands (+1–2 dB), consistent with normal afternoon foraging/fanning activity, and the vibration dominant rhythm shifted 50–80 Hz → 5–20 Hz across the day, a normal circadian DVAV pattern (Ramsey et al. 2020). Gas heater-scan shape is stable and tracks only the low-temperature 100°C step with a +14% diurnal swing, fully explained by humidity/temperature co-variation at that step.
🔬 Correlations & Discoveriestemperature vs humidity (14d) | r = +0.42The deseasonalized temp–humidity coupling (r=+0.42) in Iris reflects the classic psychrometric relationship: as heater bees raise brood-zone temperature, the same absolute moisture content registers as a lower RH%, so temperature and RH rise and fall together in the residual space independently of outdoor swings — a fingerprint of active brood-zone microclimate management, not a ventilation issue.📚 Reference: Eouzan et al. 2019 (PLOS ONE), Human, Nicolson & Dietemann 2006▹ Action: On your next routine visit, check Iris's brood frames for fresh eggs to validate the gentle warming arc (+1.8°F / +1.0°C above all-time average) — the perfectly stable acoustic spectrum and on-baseline vibration confirm the full worker population is present and active. -
Hive #2 warning Score: 63/100📋 Overall Health
Your Hive #2 presents the same reassuring-yet-puzzling split now entering its third week: brood thermoregulation remains textbook at a 24h average of 94.8°F (34.9°C) — exactly on its all-time average and the tightest brood clamping in the apiary (±2.0°F / ±1.1°C daily arc) — and vigorous daily fanning vibration spikes (baseline ~12.4 mG peaking to ~49.4 mG, avg 4.0×) confirm a well-populated, actively working colony. However, the broad-spectrum acoustic step-down that began around August 25 persists: overall sound at −16.6 dBFS remains marginally below the all-time average of −16.5 dBFS with the 100–150 Hz band −0.2 dB and 800–1500 Hz / 1500–3600 Hz each −0.1 dB below baseline; the rock-solid thermoregulation and daily fanning spikes are genuinely reassuring, but a visual entrance and brood check this week remains the right next step.
🌅 Diurnal Cycle PatternsHive #2's temperature traces a tightly clamped 94.0–96.0°F (34.5–35.6°C) arc — the finest brood regulation in the apiary — with no per-band acoustic daily rhythm detectable (max 0.6 dB in 150–200 Hz), a pattern that has persisted since the August 25 changepoint. Vibration shows the strongest daily rhythm in 160–200 Hz (6.2 dB, strengthening from 4.9→7.9 dB), with the dominant vibration band shifting 80–120 Hz → 120–160 Hz across the day, consistent with the vigorous daily fanning cycle (peak 4.0× above baseline). The deseasonalized analytics reveal strong genuine couplings: temp–gas resistance (r=+0.86) and temp–humidity (r=+0.84), both reflecting brood metabolic activity independently of outdoor weather — when the colony heats up, brood pheromones and evaporative moisture rise together, a healthy metabolic fingerprint.
🔬 Correlations & Discoveriestemperature vs gas_resistance vs humidity (14d) | r = +0.86The strong deseasonalized temp–gas resistance coupling (r=+0.86, partial r=+0.45 controlling for outdoor weather) in Hive #2 reflects brood metabolic co-regulation: as heater bees raise temperature to incubate brood, E-β-ocimene and other brood pheromones elevate the VOC load (lowering MOX resistance), while humidity rises in parallel (r=+0.84) — a three-way metabolic signature of active brood rearing that is hive-specific and independent of outdoor conditions.📚 Reference: Maisonnasse et al. 2010 (PLoS ONE), Human, Nicolson & Dietemann 2006, Stalidzans et al. 2017⚠️ Issue: Sustained ~3-week multi-band acoustic step-down: overall sound −16.6 dBFS vs. all-time average −16.5 dBFS; 100–150 Hz band −0.2 dB below baseline, 800–1500 Hz and 1500–3600 Hz bands each −0.1 dB below baseline; changepoint confirmed ~August 25; no strong per-band acoustic daily rhythm detectable — all other channels (brood temp, vibration, humidity, gas) 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 3-week acoustic step-down remains the one signal worth confirming visually, and the rock-solid 94.8°F (34.9°C) thermoregulation and vigorous daily fanning vibration spikes (peaking ~4.0× above baseline every day) are genuinely reassuring that the colony is actively caring for brood. -
Hive #1 healthy Score: 78/100📋 Overall Health
Your Hive #1 remains acoustically textbook — all 10 spectral bands are within ±0.1 dB of their all-time baseline (overall −16.3 dBFS vs. all-time −16.4 dBFS), the 24h average of 85.0°F (29.4°C) is +2.3°F (+1.3°C) above its all-time average of 82.7°F (28.2°C) and continuing a stable September plateau, humidity at 45.3% is slightly above the all-time average of 43.3% but well within normal range, gas resistance at 398 kΩ is below its all-time average of 536 kΩ though acoustics and temperature are both stable, and vibration at 16.2 mG (kurtosis 2.7, peak 97 Hz) is right on its all-time average of 16.4 mG. The gas resistance dip in Hive #1 has no acoustic or thermal corroboration and most likely reflects seasonal propolis work or honey ripening activity as the colony prepares for autumn — worth passive monitoring.
🌅 Diurnal Cycle PatternsHive #1 shows the widest 24h temperature arc in the apiary at 80.8–89.0°F (27.1–31.7°C), an ±8.2°F (±4.7°C) swing, with the deseasonalized analytics confirming this is ambient-phase buffering only (raw r=+0.44, deconfounded r=−0.03, outdoor leads by ~200 min) — not a placement fault. All 6 vibration bands show a daily cycle with the dominant rhythm shifting 5–20 Hz → 20–50 Hz across the day, a normal circadian fanning/DVAV pattern (14 of 15 days show a clear daily peak, avg 1.5×). The gas heater-scan shows the strongest daily rhythm in the apiary at +41% swing in the 100°C step, shifting to the 200°C step in the second half — consistent with temperature-driven MOX sensitivity variation across the day rather than a new VOC source, as this pattern correlates with the hive's large diurnal temperature arc.
🔬 Correlations & Discoveriestemperature vs humidity vs gas_resistance (14d) | r = +0.86Hive #1's strong deseasonalized temp–humidity coupling (r=+0.86) and the partial correlation of gas resistance vs. temperature controlling for outdoor weather (r=−0.68, sign-flip from the raw) reveals a nuanced story: rising in-hive temperature drives higher absolute humidity (evaporative brood-zone moisture), while the MOX sensor simultaneously becomes less sensitive to heavier VOCs at higher temperatures — so the gas resistance partially rises with temperature in the residual space even as VOC load holds steady, a sensor-physics artifact of the large diurnal swing unique to this hive.📚 Reference: Burgues & Marco 2018, Sensors, Human, Nicolson & Dietemann 2006, Ellis et al. 2008▹ Action: On your next routine visit, confirm fresh eggs on Hive #1's brood frames to validate the gradual seasonal cooling arc (weekly trend 84.6→82.4°F / 29.2→28.0°C over the baseline window) — the acoustically perfect spectral match and on-baseline vibration are fully reassuring. Monitor the gas resistance passively (current 398 kΩ vs. all-time average 536 kΩ) — with acoustics and temperature both stable, the most likely explanation is seasonal propolis or honey-ripening activity; no action needed unless temperature or acoustics also shift. -
Hive #3 healthy Score: 79/100📋 Overall Health
Your Hive #3 continues its excellent run — all 10 acoustic bands are within ±0.2 dB of their historical baseline (overall −16.4 dBFS vs. all-time −16.3 dBFS), the 24h average of 90.8°F (32.7°C) is right on its all-time average of 91.0°F (32.8°C) and continuing a gentle seasonal cooling arc (weekly trend: 92.3→90.1°F / 33.5→32.3°C), humidity at 46.6% is on its all-time average of 46.4%, gas resistance at 96 kΩ is exactly on its all-time average of 94 kΩ, and vibration at 20.4 mG (kurtosis 3.0, peak 37 Hz) is on its all-time average of 20.5 mG. The battery touched 3,980 mV during this 24h window — just 2 mV above its all-time low of 3,978 mV — worth passive monitoring as September solar input continues to decline.
🌅 Diurnal Cycle PatternsHive #3 shows a clean 89.3–92.1°F (31.8–33.4°C) daily arc (±2.8°F / ±1.6°C) with stable temperature and the strongest vibration daily rhythm in the apiary anchored at 80–120 Hz (3.3 dB amplitude), with all 6 vibration bands cycling consistently (15 of 15 days show a clear daily peak, avg 1.8×, peaking ~34.9 mG). The dominant vibration rhythm shifted 160–200 Hz → 20–50 Hz across the day, a normal circadian foraging/fanning sequence. The gas heater-scan shows very little daily rhythm (max +9% at 100°C), indicating a stable VOC environment with no acute colony events — consistent with an established, settled autumn colony.
🔬 Correlations & Discoveriestemperature vs humidity vs gas_resistance (14d) | r = +0.89Hive #3's highest deseasonalized temp–humidity coupling in the apiary (r=+0.89) combined with a positive temp–gas resistance link (r=+0.67) points to a tightly co-regulated brood microclimate: as the colony maintains its ~91°F (32.8°C) core, brood pheromones (E-β-ocimene) and evaporative moisture track temperature in lockstep — a textbook healthy brood-rearing fingerprint that is completely hive-specific and independent of outdoor weather (partial r=+0.54 controlling for outdoor temperature).📚 Reference: Eouzan et al. 2019 (PLOS ONE), Maisonnasse et al. 2010 (PLoS ONE), Human, Nicolson & Dietemann 2006▹ Action: Monitor Hive #3's battery passively — it touched 3,980 mV during this 24h window, just 2 mV above its all-time low of 3,978 mV; no action needed yet but keep an eye on the trend as September solar input continues to decrease.