July 9, 2019
UPDATE 7/11/19: This new imagery from the NASA-JPL ARIA team shows a decorrelation map on the left that shows surface rupture and disturbance, and an updated surface deformation map on the right produced at a higher resuolution of 30m. Credit: NASA-JPL, JAXA, The ARIA team at NASA-JPL has produced this updated imagery of the recent California earthquakes. Shown on the left is a decorrelation map that shows surface rupture and disturbance in red. The background noise level is lower than in previous versions of this product, as the coherence was calculated using interferometric phase after being mildly filtered and removing dominant coseismic interferometric phase. On the right is shown an updated ALOS-2 surface deformation map produced at a higher resuolution of 30m vs. 90m in the previous imagery. These images can be downloaded in KMZ and GeoTIFF format at the following URL: http://aria-share.jpl.nasa.gov/20190704-0705-Searles_Valley_CA_EQs/Interferograms UPDATE 7/9/19:
July 9, 2019
Planet Earth is hotter than ever. Seas are invading formerly dry land. Dry is dryer, and wet wetter. Weather extremes threaten life and property as never before, whether it’s ongoing flooding in the U.S. Midwest and, in June, extensive inundations in southern Uruguay or volcanic eruptions in the Kuril Island chain and Papua New Guinea. The threat of natural disasters continues unabated, with populated areas especially susceptible to extreme damage from earthquakes, floods, hurricanes, landslides, volcanos and wildfires, to name but several. At a recent meeting in Geneva, Switzerland, the United Nations (U.N.) issued its biennial Global Assessment Report on Disaster Risk Reduction, or GAR (https://gar.unisdr.org/), that spells out worldwide efforts to anticipate and reduce disaster risks. NASA has partnered with the U.N., offering its strengths in remote sensing and data analysis in a collaboration that aims to confront potential global hazards head on. “We have in-space and airborne instrumentation that can ‘look’ at Earth every day of every year. What they see, we translate,” says David Green, manager of NASA’s Disaster Program. “NASA takes that data, analyzes it, and produces images and overlays that tell decisionmakers and first responders where the threats are. When disasters do occur, we steer that information to those on the ground so they can provide as much help as possible where it’s most needed.”
June 21, 2019
The NASA Disasters Program responded to a request from the USDA National Agricultural Statistics Service (NASS) to provide water extent maps for the regions affected by the recent flooding rainfall in the central U.S. Maps were generated using Sentinel 1A/B satellite overpasses of the central U.S. from 5/22/19 to 6/17/19...
May 30, 2019
The Southern and Central United States have been drenched by rainstorm after rainstorm in the spring of 2019, leading to widespread flooding. Across the continental United States, river gauges at 404 locations were above flood stage on May 29, with the vast majority along the Missouri, Mississippi, and Arkansas rivers and their tributaries. The problem was most acute in late May along the Arkansas River. As of May 29, the National Weather Service reported flooding at 22 gauges along the river in Kansas, Oklahoma, and Arkansas, not including nearby tributaries and lakes. Major flooding was observed at 13 of those gauges. News media and forecasters predicted flooding in every major community along the river in the coming days. Every county in Oklahoma was in a state of emergency, and evacuations were ordered or recommended in several communities in Arkansas. MODIS imagery of flooding on the Arkansas River May 27, 2019. Credit: NASA Earth Observatory The false-color image above was acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua and Terra on May 27, 2019.. The combination of near-infrared and visible light (MODIS bands 7-2-1) makes it easier to see rivers out of their banks and water spread across flood plains. Water is blue; vegetation is green; clouds are bright blue or white; and bare flood plains along the river are tan (2018 image).
May 28, 2019
On June 1, the 2019 Atlantic hurricane season begins. But worldwide there really is no off-season for these tropical storms; they affect the globe in one way or another year-round. At NASA, we leverage the power of our views of Earth from space and research aircraft to assist communities around the world as they plan for — and recover from — these severe, often life-threatening, events. Data from NASA’s robust constellation of orbiting satellites and airborne and ground sensors are used to assess, predict and describe disaster impacts to inform the actions of leaders, first responders, and those providing relief.
May 13, 2019
Landsat 8 Monitors Flooding on the Mississippi River // Suomi NPP VIIRS Used to Detect Wildfires Across the UK in 2019
May 8, 2019
This interactive GIS map from the NASA Disasters Mapping portal lets you view Suomi NPP VIIRS "Black Marble" imagery before and after Cyclone Fani hit the region. This data helps disaster responders track which regions were affected by power outages. VIIRS Black Marble imagery of nighttime lights in Bhubaneswar India, comparing April 30th and May 5th 2019. Credit: NASA Earth Observatory, Ranjay Shrestha / NASA GSFC In early May 2019, Tropical Cyclone Fani tore through the state of Odisha in eastern India as one of the worst storms to hit the country since 1999. The cyclone brought winds of more than 200 kilometers (120 miles) per hour when it made landfall on the morning of May 3. The storm caused several deaths and left millions of people homeless in the cities of Puri, Bhubaneswar, Cuttack, and Khurda. Fani also damaged or destroyed energy infrastructure and many buildings, leaving around 3.5 million households without electric power for days after the storm hit. The images on this page are data visualizations of where the lights went out across some of the worst affected areas in Odisha. The images show city lighting on April 30 (before the storm) and May 5, 2019, two days after Fani made landfall. The images above show Bhubaneswar, the capital and largest city in the state. The images below show nighttime lights in Cuttack, the second largest city, which lies just north of Bhubaneswar.
May 6, 2019
AIRS Images Cyclone Fani Before Landfall to Analyze Atmospheric Conditions // GPM IMERG Adds up Rainfall from Cyclone Fani
April 25, 2019
"The SAR Handbook: Comprehensive Methodologies for Forest Monitoring and Biomass Estimation" is the culmination of a two-year collaboration between NASA SERVIR and SilvaCarbon. Five trainings, led by six SAR subject matter experts, were held at hubs throughout the SERVIR network. The topics of these trainings included SAR basics, SAR for forest change detection, forest height estimation, biomass estimation, mangrove monitoring, and sampling design. Each of these training topics are covered in a SAR Handbook chapter, which includes the theoretical basics and applied exercises. You can download the entire SAR Handbook (PDF) below, or explore individual chapters, trainings and one-pagers. Each chapter of the SAR Handbook is divided into a theory section, which discusses the scientific background of the chapter topic; a tutorial section, which provides step-by-step instructions on how to put the theory into practice; and additional tutorial materials, which include data, scripts and slideshows necessary to complete the tutorial.
April 16, 2019
Suomi NPP VIIRS Tracks Blizzard in the U.S. Midwest