A timelapse combining the mid-August storm and the 'day without a sunrise' on September 9, 2020 in San Francisco (lightning from the storm contributed to the wildfires that blocked the sun).

Autumn starts now (September 22, 13:31 UTC) north of the Equator, Spring to the south. Rendered in Catfood Earth.

(Previously: Autumnal Equinox 2019)

A red-tailed hawk catches a gopher at Crissy Field.

(Previously: Red-Tailed Hawk)

Updated 2020-10-20 17:40:

Another day, possibly the same hawk, for sure not the same gopher.

Hike starts at: 37.742189, -122.471394. View in Google Earth.

This post is updated hourly with a PM2.5 (2.5 micrometer or smaller particulate matter) map of San Francisco.

The PM2.5 data comes from the Purple Air API. The map uses one hour average readings from outdoor sensors and interpolates each point in San Francisco based on the inverse of the distance to the four closest sensors. The color scale is green to yellow (0-50), yellow to orange (50-100), orange to red (100-150) and red to purple (150-200+). San Francisco is plotted using elevation contours from DataSF.

Spectacular sunset the other night, the kind where I really wish I'd left a timelapse running an hour earlier. This time I did! It was just a test run of a new GoPro Hero 8 Black to see what the nightlapse mode is capable of. I left everything on auto, including the interval, which I thought was an odd thing to have an auto mode for but that it might produce some interesting effects. Nope. The GoPro does a nice job of ramping down the shutter speed and ramping up the ISO, but it just randomly toggles the interval between one and two seconds occasionally which just glitches the video. So won't be using that mode again.

(Previously: Sunset sunset 4k)

Hazelnut Trail in San Pedro Valley Park, Pacifica. $6 vehicle fee. Currently one way so very socially distanced.

Hike starts at: 37.577953, -122.475309. View in Google Earth.

July has been very nature focused for me: rattlesnake, whale, ospreys, bald eagle and comet NEOWISE. Hikes include Bumpass Hell and the Devils Kitchen at Lassen Volcanic National Park.

I did fit in a whinge about Android usability.

Previously:

• 2019: How to backup Google Photos to Google Drive automatically after July 2019 with Apps Script
• 2018: What if the Senate Voted Proportionally to Population
• 2017: Email Alerts for new Referers in Google Analytics using Apps Script