GIS Helps Us Analyze Earthquakes

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In the realm of content creation, three crucial factors come into play: “perplexity,” “burstiness,” and “predictability.” Perplexity serves as the barometer of text complexity. Meanwhile, burstiness examines the variations in sentence structures. Lastly, predictability assesses the ease of predicting the next sentence. Human authors tend to infuse their writing with bursts of creativity – mixing lengthy, intricate sentences with concise ones. In contrast, AI-generated text often leans towards uniformity. Consequently, as I guide you in crafting the content ahead, our aim is to inject a substantial dose of perplexity and burstiness, while minimizing predictability. Our canvas is the English language.

The Tremors that Reshape Our World

Earthquakes, the capricious dancers of Mother Earth, leave an indelible imprint on our existence. The tumultuous year of 2010 bore witness to the tragic demise of 226,050 souls worldwide, victims of seismic convulsions. In the United States, where the ground quakes in solemn harmony, financial losses in the staggering tune of $6.1 billion annually can be traced back to these relentless shakers of the earth. Enter the cartographer’s realm, where mapping software ascends to paramount importance in unraveling these temblors.

Mapping the Symphony of Quakes – A Cartographic Odyssey

With the aid of sophisticated mapping software, we embark on a visual odyssey, capturing the rhythms and riddles of these seismic maestros. Drawing from the data curated by the United States Geological Survey (USGS), we chart the course of earthquakes that graced 2022, focusing on those with a magnitude exceeding 4.5. An intriguing revelation unfurls – most of these terrestrial eruptions flirt with the surface, their depths oscillating within the confines of 0 to 30 miles. Yet, the depths in Southeast Asia and South America hint at deeper, more enigmatic movements.

More intrigue lies in the very lines etched across the map – not mere chance, but the imprints of fault lines. Earthquakes, it seems, are the consequence of tectonic plates engaged in an abrupt ballet of slipping and sliding. Our revelation is confirmed when we introduce the majestic fault lines into the picture – a splendid confirmation that, in 2022, the majority of significant quakes occurred in close proximity to these geological fault lines.

Quaking by the Numbers – A Geographical Symphony

With mapping software’s nimble finesse, we can overlay data to paint a more vivid portrait of earthquake prevalence in each of the continental United States’ states. The canvas tells a tale of stark regional disparities. The western fringes, in proximity to active geological faults, sway with an abundance of earthquakes, far outnumbering their eastern counterparts. California, with its staggering 37,780 earthquakes, and Nevada, a close runner-up with 5,608, lead the seismic tally.

Yet, it’s worth pondering whether this seismic imbalance may find its roots in the sheer size of the Western states. To level the playing field, let’s consider the number of earthquakes per square mile. Upon this recalibration, Oregon and South Carolina engage in a nuanced dance, with approximately 0.004 and 0.003 earthquakes per square mile, respectively. California and Nevada, still crowned with distinction, revel in rates of 0.24 and 0.05 earthquakes per square mile, respectively.

Of Faults and Fragility – An In-depth Exploration

To delve deeper into the saga of seismic encounters, let’s ponder the miles of fault lines that crisscross the states. It’s no surprise that California takes center stage yet again, boasting a staggering 8,233 miles of such fault lines. Nevada and Oregon are the runners-up on the continental stage, with 3,765 and 1,161 miles of their own fault lines, respectively. The relationship is clear – states with a more intricate fault line tapestry are prone to a higher prevalence of earthquakes.

But surprises await, as distant Texas and Oklahoma emerge with a curious narrative. Despite their distance from the bustling western fault lines, these states witnessed a considerable frequency of earthquakes in 2022. Texas, boasting 2,902 earthquakes, and Oklahoma, with 2,721, defy geographical expectations. Texas experiences 0.01 earthquakes per square mile, while Oklahoma records 0.04 earthquakes per square mile.

Man-made Quakes – A Symphony of Intrigue

While nature has her own mysterious ways, humankind’s footprint emerges as a key player in this geological symphony. The United States Geological Survey (USGS) reveals that the disposal of waste fluids, a byproduct of oil production, fuels a recent upsurge in earthquakes in the central United States. The injection of these waste fluids exerts pressure within the fault lines, countering the frictional forces at play.

Delving into this interaction, we traverse through data from the Oklahoma Corporation Commission and the USGS. The map tells a tale of overlap, but it’s not a uniform picture. Some areas bristle with injection sites, yet remain eerily silent on the earthquake front. Here, it’s not merely the presence of injection sites, but the volumes they handle that amplify seismic risk. By focusing on sites with over 500,000 barrels in 2022, we discern a clearer correlation between injection sites and seismic events.

The resulting map paints a vivid portrait. Areas with significant wastewater injection are circled by earthquakes, yet curiosities abound – in the state’s eastern fringes, where natural quakes hold sway.

Conducting Earth’s Symphony with Mapping Software

In this lyrical journey, mapping software emerges as the conductor, orchestrating the grand symphony of earthquakes. It unveils patterns, illuminates regions of seismic fervor, and forges bridges between quakes and other natural phenomena. To witness this orchestration firsthand, a free 30-day trial of Maptitude beckons – a gateway to a world where mapping software’s nuances help us fathom and decipher the enigmatic language of earthquakes.

Footnotes:

  1. Basic earthquake counts for the World and United States, USGS.gov, 2021.
  2. Jaiswal, K., Bausch, D., Rozelle, J., Holub, J., & McGowan, S. (2017). Hazus® estimated annualized earthquake losses for the United States. FEMA P-366, Federal Emergency Management Agency.
  3. What is an earthquake and what causes them to happen?, USGS.gov.
  4. Myths and misconceptions about induced earthquakes, USGS.gov.
  5. How does the injection of fluid at depth cause earthquakes?, USGS.gov.