Earthquakes around the world

EARTHQUAKE REPORT PAST 24HRS

▪︎Global seismic activity level: low
▪︎4 quakes above magnitude 5
▪︎47 quakes between magnitude 4 and 5
▪︎117 quakes between magnitude 3 and 4
▪︎278 quakes between magnitude 2 and 3
▪︎782 quakes below magnitude 2 that people normally don't feel.
▪︎1228 quakes past 24h - previous 975 earthquakes. Geomagnetic conditions Kp4 unsettled 20 hours ago
▪︎Strongest quake today: Mag. 5.9 | 34 km W of Kokopo, East New Britain Province, Papua New Guinea - 11 hours ago

 
Earthquake swarm reported in Iceland and since it's not attributed to any volcano i'm logging it here.



Details from the Icelandic Meteorological Office:

Home-page - Icelandic Meteorological Office | Icelandic Meteorological office

Specialist remark​


An earthquake swarm began yesterday evening located near the SW-ern tip of the Reykjanes Peninsula. The swarm began with an M3.9 earthquake and six other earthquakes with magnitude above 3.0 have been detected. Nearly 600 earthquakes have been detected since the swarm began. The swarm is still ongoing though the intensity of it has decreased. The IMO has received felt reports for the largest earthquakes from the Reykjanes peninsula and the Capital area. Last time an earthquake of similar magnitude was recorded in this area was in November 2021 when an M3.5 earthquake occurred there.

Written by a specialist at 13 Apr 09:18 GMT

1649875869855.png


Week overview 4 April - 10 April​


Just under 600 earthquakes were detected by the IMO¿s SIL-seismic network last week, a similar number as the previus week when 630 earthquakes were located. All earthquakes on land were below a magnitude 3 and most of the activity was located in the Reykjanes peninsula where around 300 earthquakes were located, other activity was distributed in traditional locations. Twenty earthquakes were located around 150 km north of Iceland at Kolbeinsey ridge where the largest earthquakes were roughly a 3 in magnitude.

Biggest earthquakes during the last 48 hours​




SizeTimeQualityLocation
3.912 Apr 21:21:53Checked7.3 km NE of Reykjanestá
3.613 Apr 00:28:3334.531.6 km WSW of Eldeyjarboði
3.512 Apr 22:53:2881.597.6 km S of Eldeyjarboði

From a quick search on there was a swarm at RR in Dec 2019 March 2021.
 
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EARTHQUAKE REPORT PAST 24HRS

▪︎Global seismic activity level: moderate
▪︎7 quakes above magnitude 5
▪︎41 quakes between magnitude 4 and 5
▪︎108 quakes between magnitude 3 and 4
▪︎245 quakes between magnitude 2 and 3
▪︎590 quakes below magnitude 2 that people normally don't feel.
▪︎991 quakes past 24h (previous 1228) ▪︎Geomagnetic conditions Kp5, minor G1 Storm 1 hour ago, we'll have to wait and see the effects on seismic activity in the next hours.
▪︎Strongest quake today: Tonga 7 hours ago
 
EARTHQUAKE REPORT PAST 24HRS

▪︎Global seismic activity level: Moderate
▪︎3 quakes above magnitude 5
▪︎41 quakes between magnitude 4 and 5
▪︎118 quakes between magnitude 3 and 4
▪︎208 quakes between magnitude 2 and 3
▪︎465 quakes below magnitude 2 that people normally don't feel.
▪︎835 quakes past 24h (previous 991) ▪︎Minor geomagnetic storm G2 -20 hours ago, (16:45 UTC apex, around 18:00 UTC) Subsiding to G1 -11 hours ago. Now kp4 unsettled.
▪︎Strongest quake today: Mag. 5.5 | Qinghai, 151 km S of Laojunmiao, Gansu, China - 12 hours ago (01:26 UTC)

▪︎Moderate earthquake magnitude 4.6 20km W of El Sauzal, Baja California., Mexico 2022-04-14 23:30:55 Depth14.5 km

▪︎Moderate earthquake magnitude 4.5 46km E of Augusta, Italy 2022-04-14 20:34:39 Depth 10.0 km

▪︎Pahala Hawaii is having a series of earthquakes this morning

M3.1
9 km ENE of Pāhala, Hawaii
2022-04-15 07:11:15 Depth 32.9 km

M2.8
9 km ENE of Pāhala, Hawaii
2022-04-15 07:11:05 Depth 60.4 km

M2.5
9 km ENE of Pāhala, Hawaii
2022-04-15 07:06:01 Depth 32.3 km

M4.6 (strongest)
9 km E of Pāhala, Hawaii
2022-04-15 06:58:33 Depth 31.6 km

M4.3
8 km ENE of Pāhala, Hawaii
2022-04-15 06:58:24 Depth 34.2 km


 
More about the Sicilian Earthquake
15 April 2022

German Vulkane.net wrote more about the Sicilian Earthquake. My husband told me, that his ex-wife and friend, who lives in the city of Catania, woke up in the middle of the night (around 2.30-3.00) by that earthquake as the house was vibrating/shaking.



Sicily: Earthquake Mb 4.5

Date: 15.04.22 | Time: 01:34:39 UTC | Location: 37.28 N ; 15.80 E | Depth: 10 km | Mb 4.5
by Marc Szeglat


Seismically, there is a lot going on in and around Sicily: There was an earthquake Mb 4.5 off the east coast. At Etna, the seismicity increased a bit and there were further quakes on the Lipar island of Vulcano.

• Earthquake Mb 4.5 off the east coast
• Quake on Etna
• Vulcano with further earthquakes


sizilien.jpg

An earthquake with a magnitude of 4.5 occurred off the east coast of Sicily. The hypocentre was located at a depth of 10 km. The epicentre was located 51 km northeast of Syracuse. Catania is 69 km from the epicentre. It was a moderate tectonic quake and posed no danger to the population. There are 2 (now 15) perception reports at the EMSC. One person wrote that the earth tremor woke them up and got them out of bed. Another person reported that the quake was insignificant. So the shaking was perceived differently, although the detectors were similarly close to the epicentre.

The quake occurred at a subduction zone at the edge of the Ionian Basin. Here, the Ionian Plate dips below the Tyrrhenian Plate. The process is related to the collision of the continents of Africa and Europe, in the course of which several catastrophic earthquakes have already occurred on the coast of Sicily. The risk of strong earthquakes is latent in the region and is now no higher than usual, yet the earthquake is likely to have reminded people that they live in an earthquake zone.

The most severe earthquake disaster in Sicily occurred in 1908, when a magnitude 7.5 earthquake destroyed large parts of the port city of Messina. In terms of fatalities, it was even the most momentous natural disaster to occur in Europe in the 20th century. Depending on the source, there were between 72,000 and 110,00 victims.

However, the great Messina quake was not the only quake with catastrophic consequences. There are records of quakes in eastern Sicily in 1086 (Syracuse), 1137, 1169 and 1693 (Catania)** It is striking that the first 3 quakes were comparatively close together in time and space. It was probably an earthquake sequence.

**the 1169 and 1693 destroyed Catania almost entirely !


Etna with slight increase in seismicity

Earthquake activity on Etna has been very low in recent weeks. In recent days, a slight increase in seismicity has been observed. The INGV's shakemap shows 19 weak tremors manifested in the last 10 days. The strongest had a magnitude of 1.7. In April, there were a total of 34 weak earthquakes on Etna. The tremors reflect the normal seismic activity of an active volcano and do not indicate an increase in volcanic activity.


Vulcano: Even more quakes

vu-1.jpg

If you compare the earthquakes under Vulcano with those on Etna, you will find that the activity under Vulcano is almost twice as strong as under Etna. A total of 61 quakes were detected this month. Of these, 31 are currently shown on the earthquake map. Some of the quakes are located under the southern tip of the neighbouring island of Lipari. The quakes west of the southern tip of Lipari have disappeared from the map. I would be interested to know if ground uplift due to inflation is detected here. Since the beginning of the crisis on Vulcano, not so many earthquakes have been recorded as this month. It is also interesting to note that there have been numerous earthquakes east of the Lipari Islands in recent months.

They manifested themselves under the Tyrrhenian Sea, at a depth of more than 100 km. Partial melting takes place in this area of the asthenosphere, creating magmas. These are normal processes for a seismically and volcanically active region. They represent the activity of the underground, which sooner or later will most likely lead to a volcanic eruption on Vulcano. But so far, no one can say when it will happen. A volcanic eruption could happen within months, or even years. In between, there could also be a period of calm.
 
EARTHQUAKE REPORT PAST 24HRS

▪︎Global seismic activity level: Moderate
▪︎4 quakes above magnitude 5
▪︎39 quakes between magnitude 4 and 5
▪︎92 quakes between magnitude 3 and 4
▪︎239 quakes between magnitude 2 and 3
▪︎479 quakes below magnitude 2 that people normally don't feel.
▪︎853 quakes past 24 hours -previous 835
▪︎Geomagnetic conditions now Kp1 quiet. (Kp4 -24 hours ago)
▪︎Strongest quake: Mag. 5.4 | Coral Sea, 46 km NE of Port Vila, Shefa Province, Vanuatu - 24 hours ago
 
Last week saw two M6, both in Vanuatu, with the highest being a M6.3.
In the usual area, there were 0 out of 100 earthquakes worldwide equal to or greater than 4.5 and 1485 out of 1881 quakes of all sizes.
Percentage: 78.9%
Last week saw just one M6, that being a M6.1 in PNG
In the usual area, there were 3 out of 120 earthquakes worldwide equal to or greater than 4.5 and 1568 out of 2028 quakes of all sizes.
Percentage: 77.3%
Earthquakes 7 days to April 17th 2022.gif
 
EARTHQUAKE REPORT PAST 24HRS

▪︎Global seismic activity level: Moderate
▪︎7 quakes above magnitude 5
▪︎34 quakes between magnitude 4 and 5
▪︎147 quakes between magnitude 3 and 4
▪︎297 quakes between magnitude 2 and 3
▪︎479 quakes below magnitude 2 that people normally don't feel.
▪︎964 quakes past 24h - previous 853
▪︎ Geomagnetic conditions now Kp3 quiet.
▪︎A pulse of X-rays from the flare X1.1 produced a strong R3 shortwave radio blackout over southeast Asia and Australia 10 hours ago (0334 UTC Apr 17)


▪︎Strongest quake today: Mag. 5.8 | Coral Sea, 68 km E of Santo, Luganville, Sanma Province, Vanuatu - 6 hours ago (0746 UTC Apr 17)

▪︎Moderate Magnitude 5.1.
171 km SSW of Dompu, Indonesia
2022-04-17 05:04:10 (1004 UTC) depth 49.8 km

 
EARTHQUAKE REPORT PAST 24HRS

▪︎Global seismic activity level: Moderate
▪︎ 2 quakes above magnitude 5
▪︎42 quakes between magnitude 4 and 5
▪︎118 quakes between magnitude 3 and 4
▪︎232 quakes between magnitude 2 and 3
▪︎527 quakes below magnitude 2 that people normally don't feel.
▪︎921 quakes past 24h - previous 964
▪︎Geomagnetic conditions now Kp2 quiet.
▪︎Strongest quake today: Mag. 5.3 | South China Sea, 55 km SE of Hengchun, Pingtung, Taiwan - 2 hours 15 minutes ago

▪︎Moderate earthquake magnitude 5.1
30 km WNW of Tobelo, Indonesia 2022-04-17 22:04:58 11.2 km

▪︎very deep earthquake magnitude 4.5
274 km N of Likisá, Timor Leste 2022-04-17 21:42:20 depth 545.6 km

Deep earthquakes were discovered in the 1920s, but they remain a subject of contention today. The reason is simple: they aren't supposed to happen. Yet they account for more than 20 percent of all earthquakes.
Shallow earthquakes require solid rocks to occur, more specifically, cold, brittle rocks. Only these can store up elastic strain along a geologic fault, held in check by friction until the strain lets loose in a violent rupture.
The Earth gets hotter by about 1 degree C with every 100 meters of depth on average. Combine that with high pressure underground and it's clear that by about 50 kilometers down, on average the rocks should be too hot and squeezed too tight to crack and grind the way they do at the surface. Thus deep-focus quakes, those below 70 km, demand an explanation.
Subduction gives us a way around this. As the lithospheric plates making up Earth's outer shell interact, some are plunged downward into the underlying mantle. As they exit the plate-tectonic game they get a new name: slabs. At first, the slabs, rubbing against the overlying plate and bending under the stress, produce shallow-type subduction earthquakes. These are well explained. But as a slab goes deeper than 70 km, the shocks continue.
 
Magnitude 5.3
21 km NNE of Daigo, Japan
2022-04-18 18:16:00 Depth 98.1 km

Another deep earthquake

Magnitude 4.3
101 km N of Labuan Bajo, Indonesia
2022-04-18 08:00:33 Depth 525.7 km

Magnitude 5.6
130 km SE of Kirakira, Solomon Islands
2022-04-18 18:33:35 Depth 14.6 km

Magnitude 5.0
141 km SE of Gizo, Solomon Islands
2022-04-18 16:56:12 Depth 10.0 km
 

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