This is a project Transparent World at Caspian Sea for those interested in monitoring seal habitats from space. Environmental issues of the Caspian Sea are related to water pollution as a result of oil and gas production and transportation on the continental shelf.
In order to detect film-type pollution on the sea surface, the most efficient are radar techniques, as they are of the all-weather category. Online public results you may find here.

 

https://t.me/twworldkasp/718

In the area covered by the morning imagery, the wind is predominantly from the south and southeast at 4-7 m/s. In the southern part of the Caspian Sea, there is a wind calm.

https://t.me/twworldkasp/4345

Sentinel-1C satellite radar image acquired on 21.09.2025 02:58:57 UTC (05:58:57 Moscow time).
Location – within the Russian sector.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4344

Sentinel-1C satellite radar image acquired on 21.09.2025 02:58:32 UTC (05:58:32 Moscow time).
Location – within the Russian sector.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4343

Sentinel-1C satellite radar image acquired on 21.09.2025 02:58:07 UTC (05:58:07 Moscow time).
Location – within the borders of the Kazakhstani and Russian sectors.
No anthropogenic spots/slicks or natural oil seepages were detected.

https://t.me/twworldkasp/4342

Wind over the area covered by today's images is predominantly:
- in the northern part - westerly up to 6 m/s;
- in the central and southern parts - northwesterly up to 6-7 m/s.

https://t.me/twworldkasp/4341

 

https://t.me/twworldkasp/4340

Sentinel-1A satellite radar image acquired on 22.09.2025 14:30:04 UTC (17:30:04 Moscow time).
Location – within the Kazakhstani, Azerbaijani, and Turkmen sectors.
The following slicks were detected on the RLI:
1. Fragment of vessel discharge. Area 5.3 sq.km. In the Turkmen sector, coordinates 41°17'29.53" N, 51°43'39.78" E. Northern wind 5 m/s.

https://t.me/twworldkasp/4339

Sentinel-1A satellite radar image acquired on 2025-09-22 14:30:04 UTC (17:30:04 Moscow time).
Location – within the Russian, Kazakhstani, and Azerbaijani sectors.
No anthropogenic or natural oil seeps detected.

https://t.me/twworldkasp/4338

 

https://t.me/twworldkasp/4337

 

https://t.me/twworldkasp/4336

Sentinel-1A satellite radar image acquired on 22.09.2025 14:30:29 UTC (17:30:29 Moscow time).
Location – within the Russian and Kazakhstani sectors.
The following slicks were detected on the radar image:
1. Possible natural oil seeps. Total area 0.8 sq.km. In the Kazakhstani sector, coordinates 45°01'16.08" N, 49°44'45.46" E. West wind 3-5 m/s.

https://t.me/twworldkasp/4335

Satellite Sentinel-1A radar image acquired on 22.09.2025 14:30:54 UTC (17:30:54 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4334

On the water area covered by morning images, the wind is predominantly northwest and north, 9-10 m/s.

https://t.me/twworldkasp/4333

Sentinel-1A satellite radar image acquired on 21.09.2025 02:42:35 UTC (05:42:35 Moscow time).
Location – within the boundaries of the Kazakhstani and Russian sectors.
No anthropogenic spots/slicks or natural oil seepages detected.

https://t.me/twworldkasp/4332

Sentinel-1A satellite radar image acquired on 21.09.2025 02:43:54 UTC (05:43:54 Moscow time).
Location – within the borders of the Kazakhstani, Russian, Azerbaijani, and Turkmen sectors.
No anthropogenic spots/slicks or natural oil seepages were detected.

https://t.me/twworldkasp/4331

Sentinel-1A satellite radar image acquired on 21.09.2025 02:43:54 UTC (05:43:54 Moscow time).
Location – within the borders of the Kazakhstani, Russian, Azerbaijani, and Turkmen sectors.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4330

 

https://t.me/twworldkasp/4329

Sentinel-1A satellite radar image acquired on 21.09.2025 02:43:04 UTC (05:43:04 Moscow time).
Location – within the Kazakh sector.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4328

On the water area covered by evening shots, the wind is predominantly:
- in the northern part - northerly 7 m/s;
- in the central part - northwesterly up to 15 m/s;
- in the southern part near the coast - a zone of wind calm.

https://t.me/twworldkasp/4327

Sentinel-1A satellite radar image acquired on 20.09.2025 14:46:48 UTC (17:46:48 Moscow time). Location – within the Russian sector. No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4326

Sentinel-1A satellite radar image acquired on 20.09.2025 14:46:23 UTC (17:46:23 Moscow time). Location – within the Russian sector. No anthropogenic spots/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4325

Sentinel-1C satellite radar image acquired on 20.09.2025 02:49:54 UTC (05:49:54 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4324

Sentinel-1A satellite radar image acquired on 20.09.2025 14:45:58 UTC (17:45:58 Moscow time).
Location – within the Russian and Azerbaijani sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4323

On the water area covered by morning images, the wind is predominantly easterly at 7-11 m/s.

https://t.me/twworldkasp/4322

 

https://t.me/twworldkasp/4321

Sentinel-1A satellite radar image acquired on 09/19/2025 03:00:07 UTC (05:03:07 Moscow time).
Location – within the Russian sector.
The following oil slicks were detected on the radar image:
1. Pollution from a coastal object. Area 0.24 sq.km. In the Russian sector, coordinates 43°00'16.55" N, 47°47'91.82" E, Makhachkala, source presumably a ship repair plant. West wind 2 m/s.
2. Pollution from a coastal object. Area 0.15 sq.km. In the Russian sector, coordinates 43°00'54.63" N, 47°47'26.56" E, Makhachkala, source presumably the Oil Port. West wind 2 m/s.

https://t.me/twworldkasp/4320

Sentinel-1A satellite radar image acquired on 09/19/2025 02:59:13 UTC (02:59:13 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4319

Sentinel-1A satellite radar image acquired on 09/19/2025 02:59:42 UTC (02:59:42 Moscow time).
Location – within the Russian sector.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4318

On the water area covered by evening images, the wind is predominantly:
- in the northern part - north-easterly and easterly up to 5-6 m/s;
- in the central part, in the Kazakh sector - north-easterly; in the Russian sector - south-easterly 4-5 m/s;
- in the southern part, on the border of the Kazakh and Azerbaijani sectors - a zone of wind calm.

https://t.me/twworldkasp/4317

Sentinel-1A satellite radar image acquired on 2025-09-15 14:37:48 UTC (17:37:48 Moscow time).
Location – within the Russian, Kazakhstani, and Azerbaijani sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4316

 

https://t.me/twworldkasp/4315

 

https://t.me/twworldkasp/4314

Sentinel-1A satellite radar image acquired on 15.09.2025 14:38:13 UTC (17:38:13 MSK).
Location – within the Russian and Kazakh sectors.
The following slicks were detected on the RLI:
1. Group ship discharge. Total area 15.7 sq km. In the Russian sector, coordinates 43°12'15.87" N, 48°09'24.20" E. Sea wind ESE 4 m/s.
2. Probable ship discharge. Area 0.6 sq km. In the Russian sector, coordinates 43°34'23.74" N, 47°59'53.34" E. Sea wind ESE 4 m/s.

https://t.me/twworldkasp/4313

 

https://t.me/twworldkasp/4312

 

https://t.me/twworldkasp/4311

 

https://t.me/twworldkasp/4310

 

https://t.me/twworldkasp/4309

Sentinel-1A satellite radar image acquired on 2025-09-15 14:38:38 UTC (17:38:38 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4308

Sentinel-1A satellite radar image acquired on 2025-09-15 14:39:03 UTC (17:39:03 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seepages detected.

https://t.me/twworldkasp/4307

On the Northern Caspian Sea area covered by morning images, the wind is northerly and northeasterly up to 7 m/s.
In the central part of the Caspian Sea, predominantly:
- off the Kazakhstani coast - northerly 4-6 m/s;
- off the Russian coast - easterly 3-5 m/s.
In the Derbent area - a zone of wind calm.

https://t.me/twworldkasp/4306

 

https://t.me/twworldkasp/4305

 

https://t.me/twworldkasp/4304

Sentinel-1C satellite radar image acquired on 09/15/2025 02:42:05 UTC (05:42:05 Moscow time). Location – within the Kazakh sector. No anthropogenic or natural oil seeps detected.

https://t.me/twworldkasp/4303

 

https://t.me/twworldkasp/4302

Sentinel-1C satellite radar image acquired on 09/15/2025 02:41:40 UTC (05:41:40 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4301

Over the water area covered by evening images, the wind is predominantly northeast at 8-9 m/s, northwest 6-8 m/s along the coast from Makhachkala to Baku.

https://t.me/twworldkasp/4300

 

https://t.me/twworldkasp/4299

Sentinel-1A satellite radar image acquired on 14.09.2025 02:51:41 UTC (05:51:41 Moscow time).
Location – within the Russian and Kazakhstani sectors.
The following oil slicks were detected on the RLI:
1. Pollution from a coastal object. Area 0.11 sq.km. In the Russian sector, coordinates 43°00'02.64" N, 47°47'61.33" E, Makhachkala, source presumably a shipyard. Northwest wind 5 m/s.

https://t.me/twworldkasp/4298

Sentinel-1A satellite radar image acquired on 2025-09-14 02:50:47 UTC (05:50:47 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic spots/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4297

Sentinel-1A satellite radar image acquired on 2025-09-14 02:52:06 UTC (05:52:06 Moscow time).
Location – within the Russian, Azerbaijani, and Kazakhstani sectors.
No anthropogenic spots/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4296

 

https://t.me/twworldkasp/4295

Sentinel-1A satellite radar image acquired on 14.09.2025 02:51:16 UTC (05:51:16 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4294

Wind over the area covered by evening images is predominantly:
- In the northern part - northeast up to 10 m/s;
- In the central part - northeast up to 13 m/s;
- In the southern part, along the Kuryk-Derbent line - northeast 2-4 m/s; closer to Garabogaz - north up to 6 m/s.

https://t.me/twworldkasp/4293

 

https://t.me/twworldkasp/4292

 

https://t.me/twworldkasp/4291

Sentinel-1A satellite radar image acquired on 10.09.2025 14:30:28 UTC (17:30:28 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4290

Sentinel-1A satellite radar image acquired on 2025-09-10 14:30:03 UTC (17:30:03 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4289

Sentinel-1A satellite radar image acquired on 10.09.2025 14:30:53 UTC (17:30:53 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4288

According to August 2025 monitoring results, 16 pollution incidents covering a total area of 12.5 km² were recorded in the Russian sector of the Caspian Sea.

Main areas:

Makhachkala agglomeration — recurring patches near the port, oil storage facilities, and urban wastewater outlets. Some pollution originated from the coast (sewage, industrial discharges).

Makhachkala outer roadstead — persistent patches in vessel anchorage areas. Linear pollution, typical of ballast and bilge water discharges, is frequently observed here.

Shipping lanes along the coast — separate large patches, most likely formed during vessel traffic on the Astrakhan – Makhachkala – Baku route.

https://t.me/twworldkasp/4287

In August 2025, satellite monitoring by the "Transparent Caspian World" project recorded a large oil spill covering 82.4 km².

The spill was detected at the border of the Kazakh and Azerbaijani sectors of the sea. The scale and extent of the spill make it the largest incident of the month and one of the most significant in recent years.

Satellite images showed the spill had an elongated shape, typical of ship discharges or releases from offshore facilities. Precise source identification requires a comprehensive analysis: AIS data on shipping activity, hydrometeorological conditions, and coastal observation data. Image: Ship spill at the border of the Kazakh and Azerbaijani sectors, on Sentinel-1A/1C SAR imagery 16.08.2025. © ESA

https://t.me/twworldkasp/4286

Wind over the area covered by today's images:
- In the northern part: northeast 6 m/s;
- In the central part: east 4-5 m/s;
- In the southern part: north 4 m/s.
Wind calm area near the coast in the Aktau region.

https://t.me/twworldkasp/4285

Sentinel-1A satellite radar image acquired on 09.09.2025 02:43:54 UTC (05:43:54 Moscow time).
Location – within the Kazakhstani, Russian, Azerbaijani, and Turkmen sectors.
No anthropogenic spots/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4284

Sentinel-1A satellite radar image acquired 09.09.2025 02:42:35 UTC (05:42:35 Moscow time).
Location – within the borders of the Kazakhstani and Russian sectors.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4283

Sentinel-1A satellite radar image acquired on 09.09.2025 02:43:29 UTC (05:43:29 Moscow time).
Location – within the borders of the Kazakhstani and Russian sectors.
No anthropogenic spots/slicks or natural oil seepages detected.

https://t.me/twworldkasp/4282

Sentinel-1A satellite radar image acquired 09.09.2025 02:43:04 UTC (05:43:04 Moscow time).
Location – within the Kazakh sector.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4281

On the water area covered by today's images, the wind is predominantly from the east:
- 7-8 m/s in the northern part;
- 4-5 m/s in the central and southern parts.
A windless area is observed off the coast near Derbent.

https://t.me/twworldkasp/4280

Sentinel-1A satellite radar image acquired on 08.09.2025 14:45:58 UTC (17:45:58 Moscow time).
Location – within the Russian and Azerbaijani sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4279

 

https://t.me/twworldkasp/4278

 

https://t.me/twworldkasp/4277

Sentinel-1A satellite radar image acquired on 08.09.2025 14:46:23 UTC (17:46:23 Moscow time).
Location – within the Russian sector.
The following slicks were detected on the radar image:
1. Wastewater pollution. Area 0.7 sq.km. In the Russian sector (Makhachkala), coordinates 42°58'28.82" N, 47°32'22.70" E. South-easterly wind 4 m/s.
2. Pollution from a stream mouth. Area 1.4 sq.km. In the Russian sector (Makhachkala), coordinates 42°57'55.66" N, 47°33'45.32" E. South-easterly wind 4 m/s.
3. Wastewater pollution. Area 0.7 sq.km. In the Russian sector (Izberbash), coordinates 42°33'39.68" N, 47°54'15.73" E. South wind 2 m/s.

https://t.me/twworldkasp/4276

 

https://t.me/twworldkasp/4275

Sentinel-1A satellite radar image acquired on 08.09.2025 14:46:48 UTC (17:46:48 Moscow time).
Location – within the Russian sector.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4274

On the water area covered by morning images, the wind is predominantly northeast at 2-4 m/s. In the northern part of the Caspian Sea, the wind is westerly at 7 m/s.

https://t.me/twworldkasp/4273

Sentinel-1A satellite radar image acquired on 07.09.2025 02:59:13 UTC (05:59:13 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4272

4. Pollution from a coastal facility, stormwater runoff. Area: 1.30 sq km. In the Russian sector (Makhachkala), coordinates 42°98'26.87" N, 47°53'99.28" E. Northeast wind at sea, 3 m/s.
5. Pollution from a stream mouth. Total area: 1.03 sq km. In the Russian sector (Makhachkala). Coordinates 42°96'73.70" N, 47°56'73.84" E. Northeast wind at sea, 3 m/s.

 

https://t.me/twworldkasp/4271

 

https://t.me/twworldkasp/4270

Sentinel-1A satellite radar image acquired 07.09.2025 03:00:07 UTC (05:00:00 Moscow time).
Location – within the Russian sector.
The following slicks were identified on the RLI:
1. Pollution from a coastal object, probably an oil harbor. Area 1.14 sq.km. In the Russian sector (Makhachkala), coordinates 43°01'04.51" N, 47°47'25.14" E. Northeast wind 3 m/s.
2. Pollution from a coastal object, probably an oil depot. Area 0.22 sq.km. In the Russian sector (Makhachkala), coordinates 43°02'55.71" N, 47°46'84.10" E. Northeast wind 3 m/s.
3. Pollution in the area of the seaport. Area 1.47 sq.km. In the Russian sector (Makhachkala), coordinates 43°00'33.69" N, 47°49'66.41" E. Northeast wind 3 m/s.

https://t.me/twworldkasp/4269

 

https://t.me/twworldkasp/4268

Sentinel-1A satellite radar image acquired 07.09.2025 02:59:42 UTC (05:59:42 Moscow time).
Location – within the Russian sector.
The following slicks were identified on the radar image:
1. Possible ship discharge. Area 2.27 sq.km. In the Russian sector. Coordinates 43°53'85.78" N, 48°15'16.48" E. North wind at 3 m/s.

https://t.me/twworldkasp/4267

On the water area covered by evening images, a meeting zone (calm) of two air masses is observed, stretching almost meridionally from Derbent to the north. West of this "strip" the wind is westerly and north-westerly up to 5 m/s.
East of this "strip" is a zone of winds blowing from Central Asia, mainly: easterly in the southern part; changing direction to SE and southerly up to 6 m/s when moving north.

https://t.me/twworldkasp/4266

Sentinel-1A satellite radar image acquired on 03.09.2025 14:37:48 UTC (17:37:48 Moscow time).
Location – within the Russian, Kazakh, and Azerbaijani sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4265

 

https://t.me/twworldkasp/4264

 

https://t.me/twworldkasp/4263

Sentinel-1A satellite radar image acquired 03.09.2025 14:38:13 UTC (17:38:13 Moscow time).
Location – within the Russian and Kazakh sectors.
The following oil slicks were identified on the RLI:
1. Pollution from a creek mouth. Total area 0.2 sq.km. In the Russian sector (Izberbash). Coordinates 42°33'04.57" N, 47°54'19.12" E. North wind 2 m/s.
2. Possible ship discharge. Area 0.3 sq.km. In the Kazakh sector. Coordinates 43°51'03.59" N, 49°52'18.25" E. South wind 5 m/s.

https://t.me/twworldkasp/4262

 

https://t.me/twworldkasp/4261

 

https://t.me/twworldkasp/4260

Sentinel-1A satellite radar image acquired on 03.09.2025 14:38:38 UTC (17:38:38 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4259

Sentinel-1A satellite radar image acquired on 03.09.2025 14:39:03 UTC (17:39:03 Moscow time).
Location – within the Russian and Kazakhstani sectors.
No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4258

Over the water area covered by morning images, the wind is predominantly southeast at 8-9 m/s.

https://t.me/twworldkasp/4257

 

https://t.me/twworldkasp/4256

Sentinel-1C satellite radar image acquired 03.09.2025 02:42:04 UTC (05:42:04 Moscow time).
Location – within the Kazakh sector.
The following slicks were identified on the RLI:
1. Probable natural oil seeps. Total area 0.06 sq.km. In the Kazakh sector. Coordinates 45°33'40.55" N, 50°05'02.57" E. South-easterly wind 7-8 m/s.

https://t.me/twworldkasp/4255

 

https://t.me/twworldkasp/4254

Sentinel-1C satellite radar image acquired 03.09.2025 02:41:39 UTC (05:41:39 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic spots or natural oil seeps detected.

https://t.me/twworldkasp/4253

Over the water area covered by morning imagery, the wind is predominantly north-easterly at 6-9 m/s. In the southern part, off the coast of Iran, there is a circular movement with a counter-clockwise change in direction at 4-6 m/s.

https://t.me/twworldkasp/4252

Sentinel-1A satellite radar image acquired 02.09.2025 02:50:47 UTC (05:50:47 Moscow time).
Location – within the borders of the Russian and Kazakh sectors.
No anthropogenic spots/slicks or natural oil manifestations were detected.

https://t.me/twworldkasp/4251

Sentinel-1A satellite radar image acquired 02.09.2025 02:51:16 UTC (05:51:16 Moscow time). Location – within the Russian and Kazakhstani sectors. No anthropogenic slicks or natural oil seeps detected.

https://t.me/twworldkasp/4250

Sentinel-1C satellite radar image acquired 02.09.2025 02:51:41 UTC (05:51:41 Moscow time).
Location – within the Russian and Kazakh sectors.
No anthropogenic stains/slicks or natural oil seeps detected.

https://t.me/twworldkasp/4249

 

https://t.me/twworldkasp/4248

Sentinel-1A satellite radar image acquired 02.09.2025 02:52:06 UTC (05:52:06 Moscow time).
Location – within the Russian, Azerbaijani, and Kazakhstani sectors.
The following slick is identified on the radar image:
1. Possible discharge from a coastal object, stream. Area 2.63 sq.km. In the Russian sector, Izberbash city. Coordinates 42°63'06.71" N, 47°80'15.16" E. Southeast wind 6 m/s.

https://t.me/twworldkasp/4247