#GeneralKnowled | Seismometers, seismographs, seismograms - what's the difference?
---------------------
#Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network. The earliest "seismoscope" was invented by the Chinese philosopher Chang Heng in A.D. 132. This did not, however, record earthquakes; it only indicated that an earthquake was occurring. The first seismograph was developed in 1890.
#Seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with "seismograph".
#Seismogram is the recording of the ground shaking at the specific location of the instrument.
Source: USGS
---------------------
#Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network. The earliest "seismoscope" was invented by the Chinese philosopher Chang Heng in A.D. 132. This did not, however, record earthquakes; it only indicated that an earthquake was occurring. The first seismograph was developed in 1890.
#Seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with "seismograph".
#Seismogram is the recording of the ground shaking at the specific location of the instrument.
Source: USGS
#GeneralKnowledge | What is Richter scale ?
-----------------
The Richter scale is a scale that seismologists use to measure the amount of ground shaking and energy that is released from earthquakes. It was created in 1935 and is highly efficient when measuring earthquakes that are small to medium-sized.
The earthquake's magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph.
-----------------
The Richter scale is a scale that seismologists use to measure the amount of ground shaking and energy that is released from earthquakes. It was created in 1935 and is highly efficient when measuring earthquakes that are small to medium-sized.
The earthquake's magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph.
👍4
Paper to read
Assessing Seismic Risks in Ethiopia
Assessing Seismic Risks in Ethiopia
Dofen volcano is back to active status
Telegram
TIKVAH-ETHIOPIA
ቪድዮ ፦ በዱለቻ ወረዳ ዶፋን ተራራ ላይ የእሳተ ገሞራ ፍንዳታ ተከሰተ።
ሰሞኑን የመሬት መንቀጥቀጥ ሲስተዋልባቸው ከነበሩት አካባቢዎች አንዱ በሆነው ዱለቻ ወረዳ ዶፋን ተራራ ላይ ዛሬ የእሳተ ገሞራ ፍንዳታ ተከስቷል፡፡
ይህን ተከትሎም በአካባቢው ነዋሪዎች ላይ ጉዳት እንዳይደርስ ርብርብ እየተደረገ መሆኑን በአፋር ክልል የጋቢ ረሱ ዞን ዋና አሥተዳዳሪ አብዱ ዓሊ ተናግረዋል።
በዚሁ መሠረት " በተቀናጀ…
ሰሞኑን የመሬት መንቀጥቀጥ ሲስተዋልባቸው ከነበሩት አካባቢዎች አንዱ በሆነው ዱለቻ ወረዳ ዶፋን ተራራ ላይ ዛሬ የእሳተ ገሞራ ፍንዳታ ተከስቷል፡፡
ይህን ተከትሎም በአካባቢው ነዋሪዎች ላይ ጉዳት እንዳይደርስ ርብርብ እየተደረገ መሆኑን በአፋር ክልል የጋቢ ረሱ ዞን ዋና አሥተዳዳሪ አብዱ ዓሊ ተናግረዋል።
በዚሁ መሠረት " በተቀናጀ…
👍1
Dofen known as smoking mountain ⛰️
Smithsonian Institution | Global Volcanism Program
Global Volcanism Program | Dofen
The Dofen shield volcano rises 450 m above the Awash plain in the northern Main Ethiopian Rift. Numerous cinder cones, constructed along a 10-km-long, N-S-trending line, occur on the flanks of the dominantly rhyolitic volcano. The northern cones are younger…
What did we learn from past earthquakes ? Especially from the 2016 Hawassa Earthquake ?
ADS
The 24th January 2016 Hawassa earthquake: Implications for seismic hazard in the Main Ethiopian Rift
Earthquakes of low to intermediate magnitudes are a commonly observed feature of continental rifting and particularly in regions of Quaternary to Recent volcanism such as in the Main Ethiopian Rift (MER). Although the seismic hazard is estimated to be less…
Seems the earthquake adding up more and more energy through time.
Overnight the maximum magnitude registered as 5.8
Overnight the maximum magnitude registered as 5.8
Earthquaketrack
5.7 magnitude earthquake near Abomsa, Amhara, Ethiopia and Addis Ababa, Ādīs Ābeba, Ethiopia : 2025-01-04 00:52:21 UTC
54 km N of Āwash, Ethiopia - 5.7 EARTHQUAKE - Nazrēt, Bishoftu, Addis Ababa, Dire Dawa, Desē, Hawassa, Bahir Dar, Djibouti, Jīma, Hargeysa, Mekele, Gondar, Berbera, Ta‘izz, Aden, and Asmara - 2025-01-04 00:52:21 UTC
😢2👍1
Ethiopian Association of Geoscience (EAG)
Updated map of Fentale earthquake Earthquake Hazard Distribution and geological summary included
If you carefully see this map. About 290,000 peoples living within 35 kilometers radius from Mount Fentale.
Now government decided to move 80,000 peoples from 12 Kebeles.
If the magnitude continue to increase, more efforts might be needed!
Indeed, it isn't an easy task. But we have to work hard and off course vigilantly.
Now government decided to move 80,000 peoples from 12 Kebeles.
If the magnitude continue to increase, more efforts might be needed!
Indeed, it isn't an easy task. But we have to work hard and off course vigilantly.
This media is not supported in your browser
VIEW IN TELEGRAM
How to protect yourself during earthquake
This media is not supported in your browser
VIEW IN TELEGRAM
Video showing the damage caused by last night’s earthquake at the Kessem Sugar Factory. All factory more than 1000 staff have been evacuated
#GeneralKnowledge | Earthquake magnitude & intensity with distance from epicenter ?
---------
Earthquake waves diminish in intensity as they travel through the ground, so earthquake shaking is less intense farther from the epicenter.
Low-frequency waves diminish less rapidly with distance than do high-frequency waves.
Therefore, the damage/intensity at the epicenter is higher than farther distance.
That's why the Fentale earthquake doesn't felt equally at Metahara, Adama and Addis Ababa. The same with expected damages.
---------
Earthquake waves diminish in intensity as they travel through the ground, so earthquake shaking is less intense farther from the epicenter.
Low-frequency waves diminish less rapidly with distance than do high-frequency waves.
Therefore, the damage/intensity at the epicenter is higher than farther distance.
That's why the Fentale earthquake doesn't felt equally at Metahara, Adama and Addis Ababa. The same with expected damages.
👍2
Crack and symmetrical vents producing vapor .. report by EBC
YouTube
የመሬት መንቀጥቀጡ አሁናዊ ሁኔታ በአፋር ክልል ገቢረሱ ዞን Etv | Ethiopia | News zena
በአፋር ክልል ገቢረሱ ዞን ዱለሳ ወረዳ ሳገንቶ ቀበሌ የመሬት መንቀጥቀጡ አሁናዊ ገጽታ ምን ይመስላል? #ebc #etv #ebcnews #EBCTelevision #etvnews #EBCቲቪ #ኢቢሲ #ኢቲቪ #EBCNewsUpdate #ethiopiatoday #BreakingNewsEBC
#የኢቢሲማስታወቂያ #አሁን #ሰበርዜና #ethiopianpolitics #ዛሬ #today #EBCJournalism #ፖለቲካናዜና…
#የኢቢሲማስታወቂያ #አሁን #ሰበርዜና #ethiopianpolitics #ዛሬ #today #EBCJournalism #ፖለቲካናዜና…
👍3
Could this lead to the development of a big fissural eruption ? ???
Or multiple vents with fissures ?
Like the 2005 Babbahu volcanic eruption ?
Like the 2005 Babbahu volcanic eruption ?
👍2
#GeneralKnowledge | Phreatic Eruption (explosion)
---------
A phreatic eruption is made up of steam-driven explosions that occur when water beneath the ground or on the surface is heated by volcanic activity. The water, once heated, begins to boil or can even flash straight to steam, causing an explosion.
Ejecta include
- steam / Water
- rock fragments
----- Others words ------
Phreatovolcanism
Hydrovolcanism
---------
A phreatic eruption is made up of steam-driven explosions that occur when water beneath the ground or on the surface is heated by volcanic activity. The water, once heated, begins to boil or can even flash straight to steam, causing an explosion.
Ejecta include
- steam / Water
- rock fragments
----- Others words ------
Phreatovolcanism
Hydrovolcanism
👍2