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CookieCrisp 3 hours ago

I know large earthquakes are effectively random (ignoring aftershocks) but this feels like a lot this year, yeah?

HaloZero 23 minutes ago | parent | next [-]

Yeah, I looked this up and USGS literally has a page about this.

https://www.usgs.gov/faqs/why-are-we-having-so-many-or-so-fe...

According to long-term records (since about 1900), we expect about 16 major earthquakes in any given year. That includes 15 earthquakes in the magnitude 7 range and one earthquake magnitude 8.0 or greater. In the past 40-50 years, our records show that we have exceeded the long-term average number of major earthquakes about a dozen times.

You can see a map of ALL the 7+ here:

https://earthquake.usgs.gov/earthquakes/map/?extent=-89.0318...

The search filtering is a bit hard to find in the UI but the parameters in the URL can be modified. (We had 16+ 7.0 last year as a comparison)

teacpde 3 hours ago | parent | prev | next [-]

Yea, feel like a lot of big ones this year, but looking it up https://en.wikipedia.org/wiki/List_of_earthquakes_in_2026 it is actually not necessarily worse than previous years.

beloch 38 minutes ago | parent | prev | next [-]

Earthquakes can occur in swarms[1] (distinct from aftershocks), with many of a similar size (i.e. Not a big quake followed by smaller ones) occurring in a small area over "relatively short" periods of time (i.e. days, weeks, or years).

The USGS map shows the 7.7 quake being followed by about 19 other smaller quakes near or in Indonesia within just a few hours. These are probably aftershocks.

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[1]https://en.wikipedia.org/wiki/Earthquake_swarm

jtfrench 4 minutes ago | parent | prev | next [-]

It does feel like a lot

ortusdux 3 hours ago | parent | prev | next [-]

76 quakes ranking 7.0+ so far this decade, including 10 this year.

https://en.wikipedia.org/wiki/List_of_earthquakes_2021%E2%80...

jeffrwells 2 hours ago | parent | prev | next [-]

HN highlighting a lot this year, is all

kermatt 3 hours ago | parent | prev [-]

I was wondering the same: https://www.morageology.com/earthquake_year.php

LeBit 3 hours ago | parent | next [-]

> Note: While it may look like there have been an increase in total number of earthquakes since about 2020, this is actually due to the increasing number of seismic stations installed in the park since 2020 that are able to detect smaller (<= 0.5 magnitude) earthquakes. If you look at the number of earthquakes >= 1.0, the rate has remained about the same.

jwilber 31 minutes ago | parent [-]

Somehow I don’t think people are confusing raw seismic station earthquake counts with the three back-to-back high profile/magnitude earthquakes that recently occurred in Venezuela, Colombia, and Indonesia.

I understand the point, maybe those recent earthquakes aren’t ood, but still.

goda90 3 hours ago | parent | prev | next [-]

Why does this page say there have been 0 >2.5mag earthquakes this year?

teraflop an hour ago | parent | next [-]

Because this particular sensor network is only monitoring earthquakes in the Pacific Northwest of the USA, not worldwide.

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