The latest from NASA's Earth Observatory (20 April 2021) ------------------------------------------------------------------------ Latest Images: https://earthobservatory.nasa.gov/topic/image-of-the-day * Fine-Tuning Irrigation in Asia https://earthobservatory.nasa.gov/images/148203/fine-tuning-irrigation-in-asia/?src=eoa-iotd * Surigae Stirs Up the Pacific https://earthobservatory.nasa.gov/images/148208/surigae-stirs-up-the-pacific/?src=eoa-iotd * Sea Ice Highs and Lows https://earthobservatory.nasa.gov/image ...Continue Reading

The following sections have been updated in the past 1 day. ------------------------------------------------------------------------ -- SEVERE STORMS (1 updated event, 1 new image) -- 2021 WESTERN PACIFIC TYPHOON SEASON An average of twenty tropical cyclones form each year amid some of the world's warmest ocean waters. * Surigae Stirs Up the Pacific (Image from Apr 19, 2021; Posted Apr 19, 2021) https://earthobservatory.nasa.gov/images/148208/surigae-stirs-up-the-pacific/?src=nha ----- We have a winner! Lak ...Continue Reading

*NASA History Listserv Readers: * Please see the information below regarding the upcoming *Seminar on Contemporary Science, Technology, and Culture* event scheduled for Thursday, April 22, 4:00 pm ET. Best,  Brian Brian C. Odom, PhD, MLIS (He/Him)// Acting NASA Chief Historian NASA Headquarters Washington, DC 256-541-8974 (cell) *From: *"Shindell, Matt" <ShindellM@si.edu> *Date: *Tuesday, April 20, 2021 at 8:55 AM *To: *"Shindell, Matt" <ShindellM@si.edu>, "Burke, ...Continue Reading

*NASA History Listserv Readers: * Please join us on Wednesday, April 28 @12pm EDT for our upcoming history speaker: *Stephen Walker, /Beyond: The Astonishing Story of the First Human to Leave Our Planet and Journey Into Space/* * * *Microsoft Teams link for the event: *Click here to join the meeting *Abstract:* Travelling at almost 18,000 miles per hour – ten times faster than a rifle bullet – Gagarin circles the globe in just 106 minutes. From his windows he sees the earth as nobody has be ...Continue Reading

*NASA History Listserv Readers: * * * Passing along a reminder that the Albatrosses Aerospace History Seminar will meet again at 4:00 p.m. EST on April 29, 2021. Best, Brian Brian C. Odom, PhD, MLIS (He/Him)// Acting NASA Chief Historian NASA Headquarters Washington, DC 256-541-8974 (cell) *From: *"'Neufeld, Michael' via Albatross SIG" <albatross-sig@googlegroups.com> *Reply-To: *neufeldm <neufeldm@si.edu> *Date: *Tuesday, April 20, 2021 at 8:39 AM *To: *Albatross-SIG & ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3134 Issue Time: 2021 Apr 20 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3133 Begin Time: 2021 Apr 17 1715 UTC Yesterday Maximum 2MeV Flux: 10148 pfu NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Su ...Continue Reading

:Product: Solar Region Summary :Issued: 2021 Apr 20 0030 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. # Joint USAF/NOAA Solar Region Summary SRS Number 110 Issued at 0030Z on 20 Apr 2021 Report compiled from data received at SWO on 19 Apr I. Regions with Sunspots. Locations Valid at 19/2400Z Nmbr Location Lo Area Z LL NN Mag Type 2816 S24E21 262 0120 Dai 08 08 Beta 2817 N18W46 329 0060 Bxo 05 08 Beta IA. H-alpha Pl ...Continue Reading

The following sections have been updated in the past 7 days. ------------------------------------------------------------------------ -- FIRES (1 updated event, 1 new image) -- FIRE AND HAZE IN SOUTHERN ASIA Hazy skies are a common occurrence in some parts of southern Asia due to fires, dust storms, and urban pollution. * A Fierce Fire Season in Nepal (Image from Apr 5, 2021; Posted Apr 14, 2021) https://earthobservatory.nasa.gov/images/148185/a-fierce-fire-season-in-nepal/?src=nha -- VOLCANOES (1 updated event, ...Continue Reading

April 19, 2021 RELEASE 21-039*NASA’s Ingenuity Mars Helicopter Succeeds in Historic First Flight* Ingenuity's Shadow NASA’s Ingenuity Mars Helicopter captured this shot as it hovered over the Martian surface on April 19, 2021, during the first instance of powered, controlled flight on another planet. It used its navigation camera, which autonomously tracks the ground during flight. */Credits: NASA/JPL-Caltech/* Monday, NASA’s Ingenuity Mars Helicopter became the first aircraft in history to make a powered, ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3133 Issue Time: 2021 Apr 19 0941 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3132 Begin Time: 2021 Apr 17 1715 UTC Yesterday Maximum 2MeV Flux: 14078 pfu NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Su ...Continue Reading