Volcano Crater

Look straight down into a volcano's crater at night. The lava lake is the dial: a crust of dark cooling plates split by glowing seams, white-hot in the middle. Round it rises the black basalt wall, with an ember glowing at every hour and the numbers chiselled into the stone, lit from below by the lava.

Every hour, it erupts

As the hour turns, a fountain of lava bursts from the middle of the lake, a flash lights up the whole crater, and a cloud of ash billows over the dial - then it clears and the lake glows on.

Tap to stir the lava

Tap the watch face and the lake bubbles, a burst of lava spatters up from the middle and falls back glowing, and the cracks flare bright for a moment.

Obsidian hands

Glossy black volcanic glass with sharp faceted edges and a thin molten glow along them, so they read over the brightest lava. The seconds hand is a thin glowing ember.

Three kinds of fire

• Molten: the classic orange glow.
• Blue flame: electric blue, like burning sulfur.
• White-hot: pale and fierce.

The glow of the lake, the embers, the lettering, the hands and both animations all follow your choice.

Readings in the stone

Steps, unread notifications and battery, with the date, cut into the crater's wall in the same chiselled lettering. Put another app's complication there and it shows that app's icon, or its title where it sends no icon.

Easy on the battery

The face is still at rest: the minute hand moves once a minute and the seconds hand, which you can turn off, once a second. The eruption and the tap's lava play only on the hour and on a tap. Always-on shows dim embers, dim numbers and the hands as thin glowing outlines on black.

Make it yours

• Lava: molten, blue flame or white-hot.
• Seconds hand on or off.
• Three complications.

To customize, touch and hold the watch face, then tap Customize.

Works on watches with Wear OS 6 or later. Made in Watch Face Format: nothing to install on your phone, no permissions, no data collected.

Part of Tempus Arcanum, a collection of watch faces.