As of July 21, 2026, your four-hive apiary is navigating peak July heat with two clear standouts: Hive #2 and Hive #3 continue anchoring confirmed brood cores at 94.9°F (35.0°C) and 94.1°F (34.5°C) respectively, while Iris and Hive #1 maintain fully intact acoustics confirming complete adult populations despite their peripheral-sensor temperature signatures. The outstanding priorities remain a physical brood-and-queen check for all four hives, sensor reseating in Iris and Hive #1, and stand leveling on Iris and Hive #2.
Across all four hives, the 10-step heater-scan gas curves show a striking apiary-wide divergence: Hive #3's curve bottoms out at 85–93 kΩ in the 350–375°C high-temperature steps (its recurring U-curve July fingerprint) while Iris reads 274–211 kΩ and Hive #1 reads 262–185 kΩ in those same steps — confirming that Hive #3 is processing a substantially higher mid-summer VOC load (likely intensive honey ripening and fanning), consistent with its tightest brood-core thermoregulation and the highest vibration RMS in the apiary (Frizzera et al. 2020; Bosch Sensortec BME688 datasheet).
Outdoor conditions deliver a robust 23.6°F (13.1°C) diurnal swing (69.2–92.8°F / 20.7–33.8°C) with humidity inversely tracking temperature (16–39%) and pressure stable; Hive #2 and Hive #3 continue exemplary brood-core thermoregulation (≤1.8°F / 1.0°C and ≤1.4°F / 0.8°C daily oscillations respectively) while Iris and Hive #1 show wider 3.7°F (2.1°C) and 3.8°F (2.1°C) daily swings consistent with peripheral pod placement loosely coupled to ambient air.
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Iris warning Score: 55/100📋 Overall Health
Your Iris hive remains acoustically vigorous — sound averaged −10.9 dBFS (all-time avg −10.5 dBFS, within 0.4 dB, stable over 14 days), confirming the full adult population is present and active; the 90.8°F (32.7°C) avg sensor temperature (+1.3°F / +0.7°C above all-time avg 89.5°F / 32.0°C) continues to reflect peripheral pod placement, as a true population loss would suppress sound significantly. Humidity averaged 48.1% (range 46.7–49.4%), holding just below the 50–70% brood-optimal zone but consistent with dry July outdoor conditions (outdoor humidity 16–39%); vibration is steady at 17.3 mG avg, kurtosis 2.8 (normal), dominant at 80–120 Hz — watch for the persistent broad-spectrum acoustic elevation (low bands +4–6 dB above baseline) on your next brood-and-queen check.
🌅 Diurnal Cycle PatternsIris shows a clear diurnal temperature cycle averaging +5.0°F (+2.8°C) daily oscillation (89.2–92.9°F / 31.8–33.8°C), loosely tracking outdoor ambient swings and consistent with peripheral pod placement outside the brood core. Vibration is steady around 17.3 mG with no discrete cyclic fanning peaks; the 10-step gas scan at 429 kΩ (320°C ref) sits +5% above this hive's all-time avg of 411 kΩ — the curve shape is smooth and monotonically declining from 100°C to 400°C with no notable inflection, consistent with a moderate but stable hive VOC background rather than any acute change.
🔬 Correlations & Discoveriessound_spectrum_100_150Hz vs sound_spectrum_1500_3600Hz (7d) | r = +0.91Both the low-frequency (100–150 Hz, +5.9 dB above baseline) and high-frequency (1500–3600 Hz, +5.8 dB above baseline) bands are simultaneously elevated — a broad-spectrum acoustic elevation pattern that has persisted for multiple days. Per Ferrari et al. 2008 and Ramsey et al. 2020, this kind of apiary-wide spectral broadening can accompany heightened colony arousal or increased fanning activity; the 14-day stable overall sound level rules out population loss, but physical verification of brood and queen status is warranted given the persistent multi-band shift.📚 Reference: Ramsey et al. 2020, Ferrari et al. 2008⚠️ Issue: Broad-spectrum acoustic elevation persists: 100–150 Hz +5.9 dB, 1500–3600 Hz +5.8 dB, 150–200 Hz +4.2 dB, 800–1500 Hz +3.9 dB above all-time baseline — physical brood and queen verification recommended this week.⚠️ Issue: Sensor placement: avg temp 90.8°F (32.7°C) with 5.0°F (2.8°C) diurnal oscillation — reseat pod in brood core on next visit.⚠️ Issue: Humidity avg 48.1% (low 46.7%) — below the 50–70% brood-optimal range; monitor if lows approach 45%.⚠️ Issue: Tilt at 7° — above the 0–5° acceptable range; level stand on next visit.⚠️ Issue: Battery at 4064 mV (all-time low 3730 mV) — stable 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 oscillation gap.▹ Action: Level the hive stand to bring tilt from 7° toward 0–3°.▹ Action: Retrieve and recharge the battery on this visit. -
Hive #2 warning Score: 63/100📋 Overall Health
Your Hive #2 continues outstanding brood thermoregulation — temperature locked at 94.9°F (35.0°C) avg (all-time avg 94.6°F / 34.8°C, +0.3°F / +0.2°C, exactly on baseline) with only a 1.8°F (1.0°C) daily oscillation confirming the sensor is firmly in the active brood core; sound averaged −11.0 dBFS (all-time avg −9.9 dBFS, −1.1 dB), vibration at 14.6 mG avg, kurtosis 3.0 (normal), with vigorous fanning peaks to 49.5 mG confirming peak July activity. Humidity averaged 51.6% (range 48.9–56.5%) — solidly within the 50–70% optimal zone; the 14-day acoustic falling trend (−2.6 dBFS) and broad-spectrum spectral elevation above baseline warrant a brood check this week, though temperature and vibration remain fully stable.
🌅 Diurnal Cycle PatternsHive #2 shows exemplary brood-core thermoregulation with only a 1.6°F (0.9°C) daily oscillation (94.1–95.7°F / 34.5–35.4°C), tracking the 14-day warming trend (+4.3°F / +2.4°C from 90.7°F / 32.6°C) as July peaks. Clear daily cyclic vibration fanning peaks (baseline 12.3 mG rising to 49.5 mG peaks) confirm normal diurnal foraging and ventilation activity; the 10-step gas scan at 202 kΩ (320°C ref, −47% below all-time avg 383 kΩ) shows a smooth curve with the high-temperature tail (350–400°C) flattening to 156–156 kΩ — the same flat high-temp tail noted last week, consistent with sustained peak-July honey ripening and active fanning concentrating hive volatiles.
🔬 Correlations & Discoveriestemperature vs sound_level (14d) | r = -0.73As Hive #2's brood temperature has warmed +4.3°F (+2.4°C) over 14 days toward peak July levels, overall sound energy has simultaneously fallen −2.6 dBFS — an inverse relationship consistent with the colony shifting more metabolic resources toward thermoregulation and honey ripening (active fanning) at the expense of acoustic communication density; van Dooremalen et al. 2024 note that peak-summer colonies redistribute worker roles toward ventilation, which can modestly reduce measured in-hive acoustic complexity while leaving spectral structure intact.📚 Reference: van Dooremalen et al. 2024, Ramsey et al. 2020⚠️ Issue: Broad-spectrum acoustic elevation above all-time baseline: 150–200 Hz +8.0 dB, 100–150 Hz +5.0 dB, 1500–3600 Hz +6.9 dB, 800–1500 Hz +4.5 dB — brood and queen check this week recommended.⚠️ Issue: 14-day acoustic falling trend: overall sound energy down −2.6 dBFS (from −9.0 to −11.6 dBFS); spectral energy in 100–260 Hz down −4.2 dB — worth confirming brood pattern and population on next visit.⚠️ Issue: Gas resistance at 202 kΩ is −47% below all-time avg of 383 kΩ — consistent with active honey ripening and fanning; no corroborating temp or acoustic decline, but note on next inspection.⚠️ Issue: Tilt at 9° — above the 0–5° ideal range; stand leveling recommended.▹ Action: On your next visit this week, confirm fresh eggs and solid brood pattern — the 14-day acoustic softening trend combined with spectral elevation above baseline warrants a physical look, even though temperature and vibration remain fully stable.▹ Action: Level the hive stand to bring tilt from 9° toward 0–3°.▹ Action: Note the flat high-temperature gas scan tail (350–400°C at 156 kΩ each) in your inspection log as a recurring peak-July ripening signature — this is the second consecutive week it has appeared and recording it builds valuable seasonal comparison context. -
Hive #1 warning Score: 60/100📋 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, near-perfect match), confirming the adult bee population is fully intact and active; the 89.6°F (32.0°C) avg sensor temperature (all-time avg 89.2°F / 31.8°C, +0.4°F / +0.2°C above baseline; weekly trend 90.1→90.0→89.6→87.1°F / 32.3→32.2→32.0→30.6°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 42.4% (range 40.5–44.1%) — below the 50–70% optimal zone and consistent with dry July outdoor conditions; vibration is steady at 16.6 mG avg, kurtosis 2.7 (smooth), dominant at 80–120 Hz — confirm brood presence and reseat the sensor pod on your next visit.
🌅 Diurnal Cycle PatternsHive #1 shows a clear diurnal temperature cycle averaging +3.8°F (+2.1°C) daily oscillation (87.4–91.2°F / 30.8–32.9°C), loosely tracking outdoor ambient swings consistent with peripheral pod placement; the 14-day weekly temperature drift (90.1→87.1°F / 32.3→30.6°C) continues but with perfectly stable acoustics across all 10 bands. No cyclic daily vibration fanning peaks detected (steady ~16.6 mG); the 10-step gas scan at 387 kΩ (320°C ref, +3% above all-time avg 375 kΩ) is essentially at baseline with a smooth monotonically declining curve — no shape shift, no VOC event, hive air quality is stable.
🔬 Correlations & Discoveriestemperature vs sound_spectrum_all_bands (14d) | r = +0.02The continued 14-day temperature cooling drift (−3.0°F / −1.7°C) with simultaneously stable acoustics (all 10 bands within ±0.2 dB of baseline) is the key diagnostic pattern for Hive #1: per Jones et al. 2004, a true population loss or queen event would co-suppress both temperature and sound energy, but the perfectly intact acoustic fingerprint here confirms the worker population is undisturbed — sensor positional drift outside the brood core remains the most parsimonious explanation, and reseating the pod will resolve the ambiguity.📚 Reference: van Dooremalen et al. 2024, Jones et al. 2004⚠️ Issue: 14-day temperature cooling drift continues (weekly avg: 90.1→90.0→89.6→87.1°F / 32.3→32.2→32.0→30.6°C; current avg 89.6°F / 32.0°C) — perfectly stable acoustics across all 10 bands confirms population intact; sensor displacement remains the most likely explanation; confirm brood presence and reseat pod on next visit.⚠️ Issue: Humidity avg 42.4% (low 40.5%) — below the 50–70% brood-optimal range; monitor if lows approach 40%.▹ 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 humidity lows — if they consistently approach 40%, note whether any ventilation adjustment is warranted.▹ Action: Tilt is at 4° — within acceptable range; no urgent stand action needed but check seating while reseating the sensor. -
Hive #3 healthy Score: 89/100📋 Overall Health
Your Hive #3 continues as the apiary's standout performer — brood temperature locked at 94.1°F (34.5°C) avg (all-time avg 92.8°F / 33.8°C, +1.3°F / +0.7°C above historical mean, firmly in the ideal 93–97°F / 34–36°C zone, and the 14-day warming trend of +3.1°F / +1.7°C is a healthy seasonal trajectory) with only a 1.1°F (0.6°C) daily oscillation; all 10 sound bands within ±0.2 dB of their all-time baseline (sound averaging −16.3 dBFS, matching the all-time avg −16.4 dBFS), vibration at 20.6 mG avg, kurtosis 2.7 (calm), dominant at 80–120 Hz. Humidity averaged 51.6% (range 50.2–53.0%) — the best in the apiary and solidly within the 50–70% optimal zone; the recurring U-curve gas heater-scan fingerprint (350–400°C steps rising above the 320°C reference: 85→93→110 kΩ) continues as a consistent peak-July ripening signature — continue monitoring on your next routine visit.
🌅 Diurnal Cycle PatternsHive #3 shows the tightest brood thermoregulation in the apiary — only a 1.1°F (0.6°C) daily oscillation (93.5–94.6°F / 34.2–34.8°C) fully decoupled from the 23.6°F (13.1°C) outdoor swing, confirming the sensor is seated in a robust active brood core. Vibration is steady around 20.6 mG with no discrete cyclic fanning peaks but a slightly elevated baseline consistent with continuous low-level ventilation activity; the distinctive U-curve gas scan (320°C: 93 kΩ, 350°C: 85 kΩ, 375°C: 93 kΩ, 400°C: 110 kΩ) — where the high-temperature tail rises above the 320°C reference — is now confirmed for a second consecutive week as a recurring July signature, likely reflecting a shift in the dominant VOC mix toward lighter, more thermally stable compounds during peak honey ripening.
🔬 Correlations & Discoveriesvibration_rms vs gas_resistance (lifespan) | r = -0.9Hive #3's strong negative lifespan correlation between VibrationRMS and IAQ (r = −0.898) reflects a physically meaningful relationship: as colony fanning activity intensifies (higher vibration RMS at 80–120 Hz), increased air circulation concentrates and circulates hive VOCs, reducing gas resistance and raising the effective IAQ load measured at the sensor — consistent with Frizzera et al. 2020 showing that fanning-driven airflow is a primary mechanism for redistributing hive volatiles, and Ramsey et al. 2020 confirming that vibration at 80–120 Hz is the dominant fanning signature detectable via accelerometer.📚 Reference: Frizzera et al. 2020, Ramsey et al. 2020, Hrncir et al. 2011▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern — the stable 94.1°F (34.5°C) brood temp, perfectly stable acoustics, and optimal 51.6% humidity all indicate a colony at peak July health; no urgent action needed.▹ Action: Note the recurring U-curve gas heater-scan fingerprint (350–400°C steps rising above 320°C reference: 85→93→110 kΩ) in your inspection log — this is the second consecutive week it has appeared and recording it builds valuable multi-season comparison context.▹ Action: Tilt is 4° and kurtosis is calm at 2.7 — no stand or disturbance action needed.