As of July 19, 2026, your four-hive apiary is in good overall shape heading into peak July — Hive #2 and Hive #3 continue anchoring confirmed brood cores at 34.9°C and 34.2°C respectively, while Iris and Hive #1 maintain fully intact acoustics confirming complete populations despite their peripheral-sensor temperature signatures. The outstanding visit this week remains the priority: brood and queen verification for all four hives, sensor reseating in Iris and Hive #1, and stand leveling on Iris and Hive #2.
A striking divergence in gas heater-scan fingerprints persists across the apiary: Hive #3's scan shows a distinctive U-curve with the 350–400°C high-temperature steps (89–120 kΩ) rising above the 320°C reference step — a shape signature consistent with a heavy mid-VOC load (honey ripening, active fanning) driving down the mid-range steps while the high-temperature steps plateau — while Iris and Hive #1 show monotonically declining curves with far higher overall resistance, illustrating how two colonies in the same apiary can present completely different VOC fingerprints based on activity state and population density (Bosch Sensortec BME688 datasheet; Sensors & Actuators B literature).
Outdoor conditions deliver a robust 16.9°C diurnal swing (17.4–34.3°C) with humidity inversely tracking temperature (21–46%) and pressure stable; Hive #2 and Hive #3 maintain exemplary brood-core thermoregulation (0.9°C and 1.0°C oscillations respectively) while Iris and Hive #1 continue their wider 5.2°C and 5.3°C diurnal swings, consistent with peripheral pod placement loosely coupled to ambient air rather than any colony deficiency.
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node_2662 warning Score: 55/100📋 Overall Health
Your Iris hive remains acoustically vigorous at −11.0 dBFS avg (all-time avg −10.4 dBFS, within 0.6 dB) — the population is fully present and active; the 31.5°C avg sensor temperature (all-time avg 32.0°C, −0.5°C below baseline) continues to reflect peripheral pod placement, as a true population loss would suppress sound significantly. Humidity averaged 47.7% (range 45.3–50.1%), still tracking below the 50–70% optimal zone but outdoor-driven; vibration is steady at 17.9 mG avg, kurtosis 2.7 (smooth), dominant at 80–120 Hz — the priority remains a brood-and-queen check with sensor reseating and stand leveling this week.
🌅 Diurnal Cycle PatternsIris shows a 5.2°C daily temperature oscillation (30.0–33.4°C) loosely following the outdoor ambient swing — consistent with peripheral pod placement rather than brood-core sensing; humidity tracks between 45–50% with the characteristic outdoor inverse-temperature coupling. Broad-spectrum acoustic elevation persists across the low (100–150 Hz: +5.9 dB) and high (1500–3600 Hz: +5.6 dB) bands vs. all-time baseline, with 150–200 Hz (+1.6 dB), 200–260 Hz (+2.0 dB), and 260–350 Hz (+1.3 dB) trending upward in the second half of the period — a pattern worth watching but stable overall; vibration spectrum is flat across all 6 bands with no impulsive spikes, and the gas heater-scan curve is monotonically declining (420 kΩ at 320°C, 202 kΩ at 400°C) with the 320°C reference at +3.7% above all-time avg of 405 kΩ — stable and unremarkable.
🔬 Correlations & DiscoveriesV_50_80Hz vs VibrationRMS (lifespan) | r = +0.979The 50–80 Hz metabolic-baseline band dominates total vibration RMS across Iris's full monitoring history, indicating this colony's substrate-borne energy is driven primarily by generalized colony metabolism and fanning rather than impulsive disturbance events — consistent with a calm, undisturbed hive. The absence of cyclic daily vibration peaks (confirmed by the multi-horizon trend data) distinguishes Iris from Hive #2, which shows clear 23-peak foraging/fanning spikes; this difference is likely a function of sensor placement in the hive periphery rather than a biological difference between colonies (Tautz 1996).📚 Reference: Ramsey et al. 2020, Hrncir et al. 2011, Tautz 1996⚠️ Issue: Broad-spectrum acoustic elevation persists: 100–150 Hz +5.9 dB, 1500–3600 Hz +5.6 dB, 800–1500 Hz +3.7 dB, 150–200 Hz +3.8 dB above all-time baseline — physical brood and queen verification recommended this week.⚠️ Issue: Sensor placement: avg temp 31.5°C with 5.2°C diurnal oscillation — reseat pod in brood core on next visit.⚠️ Issue: Humidity avg 47.7% — below the 50–70% brood-optimal range; outdoor-driven, monitor for further drops.⚠️ Issue: Tilt at 8° — above the 0–5° acceptable range; level stand on next visit.⚠️ Issue: Battery at 4066 mV (all-time low 3730 mV) — trajectory stable today but retrieve and recharge on next visit.▹ Action: Priority this week: brood and queen check — confirm fresh eggs, solid brood pattern, and queen presence; persistent broad-spectrum acoustic elevation warrants physical verification.▹ Action: While on-site, reseat the sensor pod firmly in the center of the brood nest frames to resolve the temperature gap.▹ Action: Level the hive stand to bring tilt from 8° toward 0–3°.▹ Action: Retrieve and recharge the battery on this visit. -
node_34225 warning Score: 65/100📋 Overall Health
Your Hive #2 continues outstanding brood thermoregulation — temperature locked at 34.9°C avg (all-time avg 34.8°C, +0.1°C, exactly on baseline) with a tight 0.9°C daily oscillation confirming the sensor is firmly in the active brood core; sound averaged −10.5 dBFS (all-time avg −9.7 dBFS, within 0.8 dB), vibration at 13.1 mG avg, kurtosis 2.9 (textbook normal), dominant at 80–120 Hz, with vigorous daily fanning peaks to 54.6 mG confirming peak July activity. Humidity averaged 48.7% (range 45.7–53.5%), trending toward the lower edge of the 50–70% optimal zone but outdoor-driven; broad-spectrum acoustic elevation persists (100–150 Hz: +7.0 dB, 150–200 Hz: +8.7 dB, 1500–3600 Hz: +7.5 dB above baseline) — a brood check this week will complete the picture.
🌅 Diurnal Cycle PatternsHive #2 shows exemplary brood-core thermoregulation: a 1.0°C daily temperature oscillation (34.5–35.5°C) completely decoupled from the 16.9°C outdoor swing, with the characteristic afternoon rise to 35.3–35.4°C reflecting peak forager activity and metabolic heat. Clear cyclic fanning/flight vibration peaks are present (23 peaks over 14 days, 12.3 mG baseline rising to 102.1 mG peaks) — a textbook diurnal activity fingerprint. Humidity cycles between 45.7–53.5%, tracking outdoor humidity inversely with temperature. The gas heater-scan at 320°C reads 267 kΩ (all-time avg 400 kΩ, −33% below baseline), consistent with elevated mid-VOC load from active honey ripening and fanning; the curve shape is monotonically declining with a slight shoulder at 350–400°C (194→178 kΩ), suggesting the heavy-volatile load is driving the low-temp steps down while the high-temp reference steps remain proportionally more stable.
🔬 Correlations & DiscoveriesV_80_120Hz vs VibrationRMS (lifespan) | r = +0.981The 80–120 Hz fanning band is the dominant driver of total vibration RMS across Hive #2's full monitoring history — matching perfectly with the 23 confirmed cyclic daily fanning peaks observed over 14 days, where the baseline of 12.3 mG surges to 102.1 mG at peak activity. This strong coupling between the 100 Hz fanning frequency and total vibration energy is consistent with Tautz (1996) and Nieh & Tautz (2000), who identified wing-fanning at ~100 Hz as the primary substrate-borne vibration signal in active summer colonies engaged in nectar curing and thermoregulation.📚 Reference: Ramsey et al. 2020, Nieh & Tautz 2000, Tautz 1996⚠️ Issue: Broad-spectrum acoustic elevation persists: 100–150 Hz +7.0 dB, 150–200 Hz +8.7 dB, 200–260 Hz +5.3 dB, 1500–3600 Hz +7.5 dB above all-time baseline — brood and queen check this week recommended.⚠️ Issue: Gas resistance at 267 kΩ is −33% below all-time avg of 400 kΩ — consistent with active honey ripening and fanning; note on next inspection for context (no corroborating temp or acoustic decline).⚠️ Issue: Tilt at 8° — above the 0–5° ideal range; stand leveling recommended.⚠️ Issue: Humidity avg 48.7% — approaching but not yet below the 50–70% brood-optimal range; monitor afternoon lows.▹ Action: On your next visit this week, confirm fresh eggs and solid brood pattern — temperature locked at 34.9°C and vigorous daily fanning peaks confirm a thriving colony; the persistent broad-spectrum spectral elevation warrants a physical look.▹ Action: Level the hive stand to bring tilt from 8° toward 0–3°.▹ Action: Note the gas heater-scan reading during inspection — the −33% drop from baseline is consistent with peak July ripening activity but worth recording for trend context.▹ Action: Monitor afternoon humidity lows — if they consistently drop below 45%, consider whether additional ventilation is warranted. -
node_44812 warning Score: 62/100📋 Overall Health
Your Hive #1 remains acoustically pristine — all 10 sound bands within ±0.2 dB of their all-time baseline (sound averaging −16.3 dBFS vs. all-time avg −16.4 dBFS), confirming the adult bee population is fully intact and active; the 30.8°C avg sensor temperature (all-time avg 31.9°C, −1.1°C below baseline; weekly trend 32.5→32.2→32.0→30.2°C showing a continuing gradual drift) is most consistent with sensor displacement outside the brood core since a population loss of any significance would suppress sound. Humidity averaged 44.4% (range 42.8–46.1%), below the 50–70% optimal zone and consistent with dry July outdoor conditions; vibration is steady at 16.2 mG avg, kurtosis 2.9, dominant at 80–120 Hz — confirm brood presence and reseat the sensor pod on your next visit.
🌅 Diurnal Cycle PatternsHive #1 shows a 5.3°C daily temperature oscillation (29.0–32.3°C) loosely following the outdoor ambient swing — the widest diurnal swing in the apiary alongside Iris, confirming peripheral pod placement. Sound is perfectly flat all day (first half −16.3 dBFS = second half −16.3 dBFS), with all 10 spectral bins within ±0.2 dB of their all-time fingerprint — no diurnal acoustic variation at all, which is a strong indicator of a stable, intact colony. Vibration is steady around 15.8 mG with no cyclic daily fanning peaks detected, consistent with the peripheral placement; the gas heater-scan at 320°C reads 377 kΩ (all-time avg 372 kΩ, +1.4% above baseline) — completely stable with a monotonically declining curve shape matching historical norms.
🔬 Correlations & DiscoveriesV_50_80Hz vs VibrationRMS (lifespan) | r = +0.96Like Iris, Hive #1's total vibration RMS is dominated by the 50–80 Hz metabolic-baseline band across its full monitoring history, with no cyclic daily peaks — consistent with a sensor position in the hive periphery where fanning vibrations (80–120 Hz) are attenuated before reaching the substrate. The perfectly stable acoustic spectrum (all 10 bands ±0.2 dB from baseline over 19 days) alongside this flat vibration profile is consistent with Ramsey et al. (2020), who identified stable multi-spectral signatures as the most reliable indicator of a colony in steady-state health.📚 Reference: Ramsey et al. 2020, Hrncir et al. 2011, Tautz 1996⚠️ Issue: 14-day temperature cooling drift continues (weekly avg: 32.5→32.2→32.0→30.2°C; current avg 30.8°C, −1.1°C below all-time avg) — acoustics perfectly stable across all 10 bands confirms population intact; sensor displacement is the most likely explanation; confirm brood presence and reseat pod on next visit.⚠️ Issue: Humidity avg 44.4% (low 42.8%) — below the 50–70% brood-optimal range; monitor if afternoon lows approach 42%.▹ Action: Plan a brood check within the week — confirm fresh eggs and solid brood pattern, and reseat the sensor pod in the brood nest center; perfectly stable acoustics across all 10 bands strongly indicate positional drift rather than any colony issue.▹ Action: Monitor afternoon humidity lows — if they approach 42%, note whether any ventilation adjustment is warranted.▹ Action: Tilt is now at 3° (improved from 5° previously) — well within the acceptable range; no stand action needed. -
node_547 healthy Score: 90/100📋 Overall Health
Your Hive #3 continues as the apiary's standout performer — brood temperature locked at 34.2°C avg (all-time avg 33.6°C, +0.6°C above historical mean, firmly in the ideal 34–36°C zone) with a tight 1.0°C daily oscillation; all 10 sound bands within ±0.1 dB of their all-time baseline, sound averaging −16.3 dBFS (exactly matching the all-time avg), vibration at 20.7 mG avg, kurtosis 2.8 (calm), dominant at 80–120 Hz. Humidity averaged 50.4% (range 49.0–51.3%) — the best in the apiary and solidly within the 50–70% optimal zone; gas resistance at 99 kΩ (~62% below all-time avg of 259 kΩ) remains low and consistent with peak July honey ripening and active fanning — continue monitoring on your next routine visit.
🌅 Diurnal Cycle PatternsHive #3 shows exemplary brood-core thermoregulation: a 1.0°C daily oscillation (33.8–34.8°C) completely decoupled from the outdoor swing, with the afternoon rise to 34.5–34.7°C reflecting peak metabolic activity. Humidity is tightly maintained between 49.0–51.3%, the narrowest and most optimal humidity band in the apiary. Sound is flat all day (first half −16.3 = second half −16.3 dBFS), all spectral bins within ±0.1 dB of baseline — a remarkably stable acoustic fingerprint. Vibration is steady around 19.4 mG with no cyclic daily peaks but healthy 80–120 Hz dominance at −8.5 dB; the gas heater-scan displays the distinctive U-curve noted in the previous report (350°C: 89 kΩ, 375°C: 101 kΩ, 400°C: 120 kΩ rising above the 320°C reference of 97 kΩ) — a shape fingerprint consistent with a sustained heavy mid-VOC load driving the low-to-mid steps very low while high-temperature steps plateau, likely reflecting peak honey ripening activity in a warm, well-populated colony.
🔬 Correlations & DiscoveriesVibrationRMS vs IAQ (lifespan) | r = -0.9Across Hive #3's monitoring history, higher vibration activity (fanning, foraging peaks) correlates inversely with lower gas resistance / higher legacy IAQ — physically: when the colony fans most intensively (high RMS vibration), it circulates and concentrates hive VOCs past the sensor, producing higher IAQ readings; this is a documented benign relationship between colony metabolic activity and MOX sensor output (Frizzera et al. 2020), and the negative coefficient here confirms the pattern is colony-driven rather than environmental.📚 Reference: Ramsey et al. 2020, Seeley 1974, Frizzera et al. 2020▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern — the stable 34.2°C brood temp, perfectly stable acoustics, and optimal 50.4% humidity all indicate a colony at peak July health; no urgent action needed.▹ Action: Note the distinctive U-curve gas heater-scan fingerprint (350–400°C steps rising above the 320°C reference) in your inspection log as a seasonal signature — recording it will build valuable comparison context for future seasons.▹ Action: Tilt is 2° and kurtosis is calm at 2.8 — no stand or disturbance action needed.