Observed thermal detection
Archived · Heat measured near Nallıhan, Nallıhan İlçesi
Archived after 7 days without detections. No satellite detection does not mean an area is safe. Cloud, sensor timing and heat below a sensor’s threshold can hide activity.
Satellite
Where the measurements are
Heat marks show satellite measurements. Orbit tracks are modelled; glow sizes and place-label positions are display context.
What each mark means
Footprint at this scaleVIIRS (NASA) 375 mMeteosat (EUMETSAT) about 1–3 km per cell · not drawn
- VIIRS (NASA)375 m
Measured positions. Drawn at true footprint scale, brightest layer.
- Meteosat (EUMETSAT)about 1–3 km per cell
Measures radiated power, which is what sizes the glow. Its individual pixel positions are not stored, so no Meteosat footprint is drawn — inferring one from the sharper layer would put a detection pixel on ground nobody measured.
- True geographic scale, corrected for latitude. Frame is about 48 km across.
- The glow means “an event, roughly here”. Its area follows the measured power and its radius is capped, because an uncapped one would assert a burnt extent nobody measured. The number carries the magnitude.
- Grey marks detections shown as history, including those on quiet or archived events. It does not establish that a later satellite pass measured no activity.
- Coastline, lakes and borders come from a generalised map with about 1,7 km between vertices, so treat every line as the shape of the geography and not as a surveyed boundary. It is drawn under the data and never over it.
- Place names sit at their own coordinates from an offline index of populated places. They say what is near the measurements — not that any named place is burning, and not how far the heat reaches.
- This event is quiet or archived, so its detections are drawn in history grey — . This status does not rule out recent heat detections or mean the activity is over.
Archived
Archived · play back
Only authorities can declare the end of a fire.
Viewing is free; saving and playback require a Pass, with no alerts for archived events.
Satellite
Current facts
No satellite detection does not mean an area is safe. Cloud, sensor timing and heat below a sensor’s threshold can hide activity.
MTG · VIIRS · Official
Verification ladder
- ConfirmedNot yet observed
Two independent satellite looks recorded the same heat; one power reading or one VIIRS detection alone does not establish this step. Confirming sensors: unknown in the public record.
- QuantifiedObserved
The heat here has a number on it — radiated power, in megawatts — and the number is what lets one reading be compared with another from the same time of day, day by day. Between measurements it says nothing. Measured by: Meteosat (EUMETSAT), VIIRS (NASA).
- Linked to an official sourceNot yet observed
An official update has been matched to this event. Official information outranks everything above it. Unknown
Official
Official source record
Official information is shown separately and takes precedence over satellite interpretation.
Official feeds are currently integrated for Portugal only.
No official feed is integrated for this country.
peak 344.1 MW · Meteosat · · 21 Jul 2026, 12:30 UTC
What each sensor measured
Meteosat looks every ten minutes; VIIRS passes a few times a day. The contrast is the point — between sharp passes there is no new sharp knowledge, only the ten-minute layer.
VIIRS · Meteosat
Observation history
Day and night observations stay labelled. REYKR does not compare unlike times of day.
Measurement record
Measured from 21 Jul 2026, 11:00 to the most recent observation on 21 Jul 2026, 13:30. Satellite readings in the 72 hours shown: 18, from VIIRS (NASA) and Meteosat (EUMETSAT). Highest single reading in that window: 344.1 MW, Meteosat (EUMETSAT) — 21 Jul 2026, 12:30, .
This is a record of what satellites have measured so far, not a statement that the activity has ended. Only an official source can say that, and heat can return to ground that has gone quiet.
Observations from the 72 hours up to 21 Jul 2026, 13:30 UTC.
- 21 Jul 2026, 13:30Meteosat1 detections · average 14.8 MW · peak 14.8 MWDay
- 21 Jul 2026, 13:20Meteosat3 detections · average 15.8 MW · peak 16.9 MWDay
- 21 Jul 2026, 13:10Meteosat3 detections · average 30.7 MW · peak 33.1 MWDay
- 21 Jul 2026, 13:00Meteosat5 detections · average 34.9 MW · peak 62.2 MWDay
- 21 Jul 2026, 12:50Meteosat7 detections · average 45 MW · peak 87 MWDay
- 21 Jul 2026, 12:40Meteosat8 detections · average 167.7 MW · peak 333.1 MWDay
- 21 Jul 2026, 12:30Meteosat6 detections · average 144.9 MW · peak 344.1 MWDay
- 21 Jul 2026, 12:20Meteosat7 detections · average 97.1 MW · peak 236.7 MWDay
- 21 Jul 2026, 12:10Meteosat7 detections · average 102.7 MW · peak 269.2 MWDay
- 21 Jul 2026, 12:00Meteosat4 detections · average 184.4 MW · peak 228 MWDay
- 21 Jul 2026, 11:50Meteosat1 detections · average 37.3 MW · peak 37.3 MWDay
- 21 Jul 2026, 11:40Meteosat5 detections · average 51.1 MW · peak 113.5 MWDay
- 21 Jul 2026, 11:30Meteosat3 detections · average 20.7 MW · peak 27.9 MWDay
- 21 Jul 2026, 11:25VIIRS5 detections · average 21.7 MW · peak 28.1 MWDay
- 21 Jul 2026, 11:20Meteosat2 detections · average 46.9 MW · peak 52.1 MWDay
- 21 Jul 2026, 11:10Meteosat2 detections · average 30.7 MW · peak 39.2 MWDay
Nearby
Other detections nearby
Other satellite-observed events within 100 km, nearest first — up to six shown.
Ankara
5.1 km away
Archived after 7 days without detectionsView event facts →Ankara
9.5 km away
Archived after 7 days without detectionsView event facts →Ankara
13 km away
Archived after 7 days without detectionsView event facts →Ankara
16 km away
Archived after 7 days without detectionsView event facts →Eskisehir
17 km away
First observation, not yet corroboratedView event facts →Eskisehir
18 km away
Archived after 7 days without detectionsView event facts →
Questions about these readings
What has been observed near Nallıhan, Nallıhan İlçesi?
Archived after 7 days without detections. No satellite detection does not mean an area is safe. Cloud, sensor timing and heat below a sensor’s threshold can hide activity.
When was the last measurement near Nallıhan, Nallıhan İlçesi?
21 Jul 2026, 13:30 UTC
How current is the last measurement near Nallıhan, Nallıhan İlçesi?
No signals: safe?
No. No detection is not proof of safety: cloud, missed passes, sub-threshold heat or failed reads leave activity unknown.
Missing or misplaced?
Outside coverage or without usable observations: unknown. Meteosat floor about 12 MW; VIIRS 375 m; Meteosat about 1–3 km. Approximate areas, not fire boundaries.
Data age?
Meteosat: every 10 min; median publication lag about 17 min, no deadline. VIIRS: usually 1–3 h after a pass. ANEPC: at least 600 s (10 min) between polls; no publication guarantee. Age per reading.
Sources?
Official above satellite. ANEPC: Portugal only. Meteosat (EUMETSAT); VIIRS (NASA): Suomi-NPP, NOAA-20, NOAA-21. Suomi-NPP retirement planned 1 November 2026.