Fire near Kalimantan occidental (ID)

1.59°S, 110.48°E · first detected on 20 September at 07:27

What the satellites measured

This fire was tracked from 20 September at 07:27 to 28 September at 08:18, that is 8 days, through 1,022 satellite detections. The detected extent reaches 4,321 ha.

Detected extent: 4,321 ha
Cumulative power: 8,557 MW
Peak power, one pixel: 433 MW
VIIRS and MODIS detections: 1,022

These four figures cover the polar orbits alone, the ones that measure an area. The pass table below also counts geostationary detections, more frequent but too coarse for geometry, and its power column sums a whole pass where the peak above is that of a single pixel.

“Detected extent” is not “burned area”: it is the union of the ground footprints of the satellite pixels, and a pixel counts in full (375 m for VIIRS, 1 km for MODIS) even when only a forest edge is burning. Compared with press figures it is in practice one and a half to three times the area reported. Detections taken at the edge of the scan swath, too coarse to measure anything at all, are excluded. These figures come from thermal detection and are not an official assessment: only the emergency services and the competent authorities are authoritative.

Replay how the fire spread

The map is framed on this fire's footprint and loads only its detections. The timeline below covers the period in which satellites saw it, from the first to the last detection, with twelve hours before and twenty-four after; the ticks on the bar mark the emergency services' announcements that fall within it. The cursor opens on the most powerful pass, and playback replays the whole fire in about thirty seconds. “1 h” shows what is burning within an hour of the chosen moment : the map then follows the power curve below and empties when it falls. “24 h” stacks twenty-four hours : a fire stays visible between two satellite passes, which come two to four times a day. Both are true, but they say different things.

How the radiative power evolved

One point per satellite pass: the sum of the fire radiative power measured over the fire. This is the curve that says whether the fire eased off or picked up again, which no cumulative figure shows. The window covers 11 days; beyond that, clustering would merge two successive fires in the same place.

Fire dynamics

Loading history…

Satellite passes in detail

Pass	Power summed over the pass	Detections	Sensor
28 September at 08:18	53 MW	2	N20
28 September at 07:23	19 MW	2	N21
26 September at 08:35	25 MW	5	N
25 September at 20:15	76 MW	43	N20
25 September at 19:56	49 MW	21	N
25 September at 19:20	13 MW	5	N21
25 September at 14:51	35 MW	2	Terra
24 September at 20:34	78 MW	32	N20
24 September at 20:15	77 MW	58	N
24 September at 08:37	81 MW	6	N21
24 September at 07:33	83 MW	9	N
23 September at 21:47	240 MW	5	Aqua
23 September at 20:53	56 MW	26	N20
23 September at 20:34	214 MW	99	N
23 September at 19:58	367 MW	96	N21
23 September at 19:13	142 MW	30	N20
23 September at 15:12	646 MW	21	Terra
23 September at 08:57	657 MW	19	N21
23 September at 08:12	820 MW	62	N20
23 September at 07:53	151 MW	4	N
23 September at 07:16	648 MW	33	N21
23 September at 02:52	15 MW	1	Terra
22 September at 22:46	71 MW	2	Aqua
22 September at 20:51	62 MW	24	N
22 September at 20:15	129 MW	28	N21
22 September at 19:32	173 MW	46	N20
22 September at 10:26	274 MW	8	Aqua
22 September at 08:29	219 MW	33	N20
22 September at 07:33	249 MW	21	N21
21 September at 22:08	103 MW	6	Aqua
21 September at 15:31	33 MW	2	Terra
20 September at 20:53	92 MW	16	N21
20 September at 20:11	246 MW	53	N20
20 September at 19:49	140 MW	37	N
20 September at 14:51	663 MW	7	Terra
20 September at 08:50	247 MW	32	N
20 September at 08:12	886 MW	72	N21
20 September at 07:27	224 MW	28	N20
19 September at 22:32	157 MW	8	Aqua
19 September at 20:28	137 MW	48	N20
19 September at 20:09	184 MW	73	N
19 September at 19:32	133 MW	31	N21
19 September at 15:53	146 MW	4	Terra
19 September at 10:11	67 MW	4	Aqua
19 September at 09:07	73 MW	7	N
19 September at 08:31	264 MW	22	N21
19 September at 07:27	63 MW	6	N
18 September at 20:47	7 MW	5	N20
18 September at 20:28	177 MW	70	N
18 September at 19:52	185 MW	66	N21
18 September at 15:12	178 MW	13	Terra
18 September at 08:50	274 MW	23	N21

8 other fires near Kalimantan occidental (ID)

Separate fires, apart in time or in space, not pieces of this one. A single municipality can have several over one summer, and a forest massif often covers more than a hundred square kilometres.

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