2017 News and Updates

November 30, 2017
MODIS True Color Terra Image
Imagery Acquired November 27, 2017 This RGB image from MODIS/Terra on November, 27th shows the presence of ash vented out from the Agung volcano as gray and brownish areas above clouds and/or water. This contrasts with the whiter clouds on the left side of the image.

 

November 30, 2017
SO2 emission map
Acquried November 29, 2017 Figure 1 shows volcanic sulfur dioxide (VSO2) plume emitted from the eruption of Mt. Agung (Bali, Indonesia) and first captured by Aura/OMI and SNPP/OMPS UV spectrometers afternoon overpasses on November 26 2017, just hours after the beginning of the explosive magmatic phase of the eruption. The data show total SO2 column amounts in Dobson Units (1 DU = 2.69 1016 molecules SO2 per cm2). Background SO2 concentrations in this location are undetectable from space, providing high confidence in detecting and tracking VSO2 plumes (blue to red colors), which are used as proxy for fine airborne volcanic ash particles presenting hazards to aviation.  

 

November 13, 2017
ESA Sentinel-1 Imagery
Acquired Nov. 11. 2017 Acquired Nov, 11 2017 NASA color coded SAR based flood detection maps reveal extensive flooding in areas of Vietnam. The SAR data used in analysis are Copernicus Sentinel data (2017), processed by ESA. In the figures, the blue tones represent flooding due to Typhoon Damrey while the black color represents water covered areas before the typhoon. Other colors indicate mostly land.  

 

November 13, 2017
Google map image with Inundation layer.
Inundation Layer from Project Mekong App as of 11/10/2017. Current inundation layer from the Project Mekong App as of 11/10/2017. Red indicates areas with detected flooding. The application uses LANCE MODIS imagery (collected today, 11/10/2017) and applies a dynamic surface water classifier based on statistical training and thresholding of NDVI values. The method is outlined in more detail in Ahamed and Bolten, 2017 (https://doi.org/10.1016/j.jag.2017.05.006).

 

November 13, 2017
Total rainfall map using IMERG model
NASA IMERG model generated from October 31 to November 6, 2017 data.  NASA's Integrated Multi-satellitE Retrievals data (IMERG) estimates precipitation from a combination of space-borne passive microwave sensors. This image shows IMERG rainfall estimates over Southeast Asia during the period from October 31 to November 6, 2017. IMERG estimated that more than 500 mm (19.7 inches) of rain was common in this part of south central Vietnam.

 

November 13, 2017
Topo relief map with flood modelling layer overlay.
Topographic relief map showing estimated flood extent. Darthmouth Flood Observatory of University of Colorado estimated maximum flood extent on November 7th, 2017 using NASA MODIS and Copernicus Sentinel 1 satelite data, operated by the European Space Agency (ESA). In the figure, the light gray denotes all previously-mapped flooding, and red is the active flooding. Blue shows the reference water extent.                                                                              

 

October 27, 2017
PolSAR Mosaic Image
UAVSAR aboard the NASA502 aircraft imaged Napa County, California on October 16 to observe areas affected by several wildfires that started on October 8 and burned thousands of buildings as well as vineyards and forests. PolSAR mosaick of HH, HV, VV polarization overlay images. The fire perimeters (red) are from the USGS Geospatial Multi-Agency Coordination website as of October 17.   The fires from north to south are: Pocket, Tubbs, Nunn, and Atlas respectively.. Flight line ID: SanAnd_05512 Close-up view of Atlas fire before (2017.3.3) and after the fire (2017.10.16) – after image shows fire scars (purple) throughout the area south of Atlas.

 

October 25, 2017
NASA's Terra Satellite Image
As firefighters continue to work toward full containment of the rash of wildfires burning in Northern California. This image from NASA's Terra Satellite acquired on Oct. 21, 2017, shows the growing fire scar on the landscape. As firefighters continue to work toward full containment of the rash of wildfires burning in Northern California, a new image from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra satellite shows the growing fire scar on the landscape. In this ASTER image, acquired Oct. 21, 2017, vegetation is red, while burned areas appear dark gray. The image covers an area of 38 by 39 miles (60.5 by 63 kilometers) and is located near 38.5 degrees north, 122.4 degrees west. With its 14 spectral bands from the visible to the thermal infrared wavelength region and its high spatial resolution of 15 to 90 meters (about 50 to 300 feet), ASTER images Earth to map and monitor the changing surface of our planet. ASTER is one of five Earth-observing instruments launched Dec. 18, 1999, on Terra. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and data products.

 

October 19, 2017
MODIS and CATS Imagery acquired Oct 11, 2017
Over a dozen wildfires have been burning since Oct. 08, 2017 in Northern California, killing 31 people, burning 2220,000+ acres and destroying over 3,500 homes. Smoke has blanketed the San Francisco Bay area, as shown in MODIS and CATS imagery from Oct. 11, 2017 (red circle). The smoke plume extends as high as 3-4 km according to the CATS backscatter and has resulted in the worst air quality ever recorded in many parts of the Bay Area.     

 

October 18, 2017
EOSDIS Worldview Image showing smoke plums
CALIPSO Ground Track on 10/13/2017           Vertical profiles of the near-field smoke plumes from the fires burning in California on October 13th, 2017.  These CALIOP data (space-based lidar) can be used for Air Quality, Hazardous plume location, and for the potential initialization of transport models.   CALIOP Vertical Feature Mask and Subtype  At this time, the smoke is not hovering near the ground.

 

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