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Three more quakes in swarm in area of known faults

There were three more small earthquakes in northwest Arizona along the Nevada border on Friday, bringing the total to 11 since March 28.The most recent ones were:Magnitude 2.0 at 11:41 a.m. Magnitude 1.5 at 12:01 p.m.Magnitude 1.7 at 8:45 p.m. Show More Summary

World's tiniest dinosaur remarkably well preserved

The world's smallest dinosaur has been recovered from the waste rock pile outside an old mine adit in northwestern Arizona. The distant cousin of the famous Tyrannosaurus-Rex ("T-Rex") would have weighed less than a pound when alive,...Show More Summary

The Fabled Island of California? Stunning New Research Suggests the Early European Explorers may have been Right

Source: Some of the earliest maps of California show it to be an island. The "correction" to this misconception didn't occur until 1746 when the Gulf of California and its terminus at the delta of the Colorado River were accurately mapped. Show More Summary

Earthquake "swarm" continues along Arizona - Nevada border

There have been 7 earthquakes recorded in northwest Arizona along the Nevada border during the past few days. The latest one of magnitude 1.0 occurred around 4 pm local time yesterday (March 30). The largest one was a magnitude 2.3 on March 28. The smallest one is only magnitude 0.8.The cluster is visible on the map south of Mesquite. [Credit, USGS]

Aftershock to yesterday's small quake on Arizona - Nevada border

There was a magnitude 2.0 earthquake at 2:55 a.m. local time this morning close to yesterday's M=2.3 and 1.8 quakes. Was this an aftershock? I'm not used to seeing earthquakes as small as M=2.3 generating aftershocks, so it may be just coincidence. [Right, today's epicenter marked by orange star. Credit, USGS]

Job Openings with the Science, Math and Engineering Division at Modesto Junior College

These positions aren't in the area of teaching earth sciences, but if you have always wanted to work with a school that places a high priority on science education and community outreach, this may interest you. Modesto Junior College is seeking some math instructors, and an administrative secretary for our division. Show More Summary

Senate vote imminent on geologist de-licensing bill

An email sent out to Arizona members of AIPG reports that the bill to eliminate licensing of geologists and other professions in Arizona (HB2613) is set to be discussed in Senate Caucus today and could be voted on by the entire Senate by Wednesday or Thursday this week. Show More Summary

Two small quakes along Nevada border

A magnitude 2.3 earthquake occurred along the Arizona-Nevada border this morning at 5:11 a.m. local time, followed by a magnitude 1.8 event (aftershock?) just over an hour later, and just southeast of the first event. [Right, orange star marks epicenter of the main shock. Credit, USGS]

Death Valley Trip, Getting There: Walker Lake, Road Stories, A Bit about Copper, and Some Folds near Luning

MOH and I left the area where we had stopped to hike (shorelines, remember?), and we steered steadily south—south to south by east—between the steep eastern face of the Wassuk Range and Walker Lake's western shore. It can be hard to drive by Walker Lake without stopping for photographs, though I find myself doing that more often than not. Show More Summary

This is One of the Rarest Forests on our Planet, and Yet One of the Most Widespread

This is one of the rarest forests on our planet. I know of a number of different species that are represented by extremely limited habitats; there are the Dawn Redwoods of China (a grove of maybe 5,000 individuals), the Wollemia "Pine" of Australia (only a 100 or so in the wild), and the Ginkgo biloba (a few scattered possibly wild groves). Show More Summary

Meadow season: These are days you’ll remember

These days the student of geology is distracted by the riot of greenery that comes with a wet winter. Last week I gave in and devoted a day to feast my eyes on Oakland’s meadows — places I’ve visited before just for the rocks. (Follow the links to see the geology instead.) King Estates Open […]

Op-ed supports preservation of AZGS mission, services

Tucson-based consulting geologist David Briggs published an opinion piece in the Arizona Independent newspaper urging the preservation of the services and products of the Arizona Geological Survey, in response the Gov. Ducey's plan to...Show More Summary

Arizona natural hazards viewer is AGI Map of the Day

The interactive map of natural hazards in Arizona produced by AZGS, was highlighted by the American Geosciences Institute as the Map of the Day on the AGI Critical Issues website. AZGS interactive map of natural hazards includes: Earthquakes...Show More Summary

UA HiRISE camera - 10 years of amazing Mars photos

The Mars Reconnaissance Orbiter marked 10 years of circling the Red Planet earlier this month, sending back a continuing stream of amazing photos from the HiRISE camera managed by the University of Arizona. Phil Plait, who blogs at Bad Astronomy, posted a wonderful retrospective of spectacular HiRISE images, including some I had not seen before. Show More Summary

Sea Otter using Geologic Materials to Procure a Snack

If I lived along the coast, I would get to see this kind of thing all the time, but I don't, and I don't always see otters when I do visit, so this was kind of special. The funny part is, I didn't really notice the otter at the bottom of the scene pounding on the rock until the very end when I zoomed in. Show More Summary

A Sight That Overwhelms: Dante's View and a Sense of Scale

It's one of the most astounding viewpoints in all of North America. The Black Mountains form the eastern edge of Death Valley, and they are one of the most rugged mountain fronts in existence. In places the mountains are so steep that one cannot see the slopes at the base from the summit. Show More Summary

National landslides hazards bill introduced in US House

AZGS has been working with our colleagues to help craft the National Landslides Hazards Reduction Act which was introduced in the US House by Rep. Suzan DelBene of Washington. Rep. DelBene's district includes the Oso landslide which killed 42 people just two years ago. Show More Summary

Free AGI webinar on critical minerals and materials, March 30

The American Geosciences Institute's Critical Issues Program is pleased to offer a free webinar, "Underpinning Innovation: The Science and Supply of America's Critical Minerals and Materials", on March 30, 2016, 1:00PM EDT. To register...Show More Summary

Things You Find in the Field: Pyramidal Objects #4

It's not a pyramid, unlike the three pyramidal objects (#1, #2, #3) I posted about a couple years back. It's actually a frustum, in this case a pyramidal frustum, one based on an oblique, irregular, triangular pyramid. That is, it'sShow More Summary

A Living Kaleidoscope in the Red Hills of the Sierra Nevada Foothills

I always thought that kaleidoscopes were named after someone named Kaleid, but the authoritative source (Wikipedia, of course) indicates that the name is a mixture of Latin terms that translates to "observation of beautiful forms." Today I was observing just that at the Red Hills Area of Critical Environmental Concern. Show More Summary

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