Meridiem

The whole Earth, live.The land, the sea, the sky, in your web browser. Meridiem needs JavaScript to draw the map.LayersFree, with an account optional for settings sync:

Right now: day and night, the sun and moon, and the space station, to the second.

Doesn't change: city lights, 2016. Time zones and plate boundaries.

$9 a month or $90 a year. 14-day trial, no card required. Free for classrooms: request it from your account.

Within minutes: lightning, from 90 seconds. Earthquakes, a few minutes.

Within the hour: radar, about 25 minutes. Tropical storms, about half an hour. Satellite imagery, half an hour to an hour. Water vapor and clouds, about an hour.

Within a few hours: fires, about three hours.

Forecast: temperature, humidity, visibility, pressure, the jet stream, snow depth, and waves, this hour. Aurora, the next hour. Aurora tonight, the coming night. Wind, within 3 hours. Ocean currents, within 12 hours.

Once a day: recent city lights, about two days. Ocean temperature, a day or two.

Questions

What's a panel?

A saved map: its layers, places, clocks, and settings. With an account, make as many as you like, such as one for the office and one for the living room. Each display shows the panel you choose.

What's a display?

Any web browser that shows a panel: a television, a small computer on the wall, or a laptop tab. A television signs in with a code that you approve from another device. One account covers all of your displays.

What's a layer?

One kind of data on the map, such as radar or coastlines. Stack layers in any order, and hide one without losing its settings. Some layers also let you change their style or color.

Can I center the map on my home?

Yes. By default, the map follows the sun to keep the day side in the middle. You can also center it on any place that you add.

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