What instruments are used to investigate earthquakes and volcanos?
598797
seismographs and seismometers
119991
It is an instrument for measuring the strength of a magnetic field and has various applications, including locating mineral deposits, archaeological sites, submerged objects, or in my primary application, measuring the past magnetic field orientation of the earth as recorded in rock samples in order to establish an age of deposition. \n\nWhat you buy or build depends on your application. The magnetometer I have used is the size of a small car. I have seen towable marine-type magnetometors for sale on eBay for under $2000, and I have seen others listed on the internet for under $500. The difference is likely to be the sensitivity. There are also instructions on the web for building your own. Here's a build your own:\nhttp://www.portup.com/~dfount/proton.htm\nHe has added  a good list of resources and references.
46950
There are many, many types of weather instruments. A complete list would be very extensive, but here are a few instruments to investigate:\n\nAnemoscope, anemometer, hygrometer, barometer,rain gauge, thermometer, sling psychometer, radiosonde, rocketsonde, theodolite, weather satellites, doppler radar, various lightning instruments like time of arrival and magnetic direction sensors, lightning imaging sensor (space-based), electric field mills, Gerdien conductivity probes, pyranometer (actinometer), evaporimeter (atmometer), and so on.
320485
What kind of detector?
149283
Volcanology (also spelled vulcanology) is the study of volcanos, lava, magma and related geological phenomena. A volcanologist (also spelled vulcanologist) is a person who studies in this field.\n\nVolcanologists frequently visit volcanoes, especially active ones, to observe volcanic eruptions, collect eruptive products including tephra, rock and lava samples. One major focus of enquiry is the prediction of eruptions; there is currently no accurate way to do this,but predicting eruptions,like predicting earthquakes,could save a lot of lives. You would have to be knowledgeable in chemistery in order to become a volcanologist.
1057804
try this\n\nhttp://en.wikipedia.org/wiki/Category:Laboratory_equipment
179776
Photos I can't manage.  Let's see what I can do about listing 20 examples of medical equipment...\n\nStethescope: Object used to listen to bodily sounds\n\nSphygmomanometer: Used to measure blood pressure\n\nReflex Hammer: Used to trigger reflexes, by hitting the tendon or muscle in the right place\n\nTongue Blade: Wooden (usually birch) implement used to hold the tongue out of the way when examining the back of the throat\n\nThermometer: Measures body temperature\n\nOtoscope: The thing used to look in the ears\n\nOphthalmoscope: the thing used to examine the retina\n\nColonoscope: The thing inserted in the anus and colon to examine the colon\n\nEndoscope: The gadget that goes down the throat to allow examination of the esophagus, stomach and duodenum\n\nPenlight: What is used to illuminate the back of the throat to examine it\n\nAnoscope: A short version of the colonoscope; used to examine the anus and proximal rectum\n\nNasal Speculum: A tool used to assist in looking up a nose\n\nHemostat: A gadget used to clamp blood vessels, and for other things, during surgery\n\nForceps: Doctor-word for overglorified tweezers\n\nScalpel: A cutting instrument; basically, an overglorified knife\n\nBovie: also called electrocautery; it uses electrical energy to superheat tissue, either producing a small burn (to stop bleeding in the operating room) or cutting tissue (as an alternative to the scalpel).\n\nNeedle: An instrument used with thread to close wounds\n\nNeedle holder: An object, slightly like pliers in appearance, that is used to hold needles when stitching\n\nRetractor: A metal gizmo used by assistants in surgery to hold the wound open\n\nSelf-Retaining Retractor: One that can be set to hold the wound open all by itself\n\nEKG: Electrocardiogram; measures the electrical activity of the heart\n\nEEG: Electroencephalogram; measures the electrical fields of the brain\n\nMRI: Magnetic resonance imaging unit; uses radiofrequency energy and incredibly intense (0.3 to 3 Tesla) magnetic fields to image soft tissue\n\nCT Scanner: Uses computer program (2D Fast Fourier Analysis, using Tukey & Fisher's fast factoring algorithm) to convert measurements of the absorbtion of X-Rays from multiple angles into an image of the tissues\n\nSonogram: Uses high frequency sound to create an image of tissue\n\nX-Ray Machine: Used to produce X-Rays to create analogue images of bone on film\n\nX-Ray Markers: Usually lead or aluminum letters used to mark the right or left side; placed on the cassettes before the film is taken\n\nX-Ray Casettes: the gadgets that hold the film; their inner surface is covered with material that floresces when exposed to X-Rays, making the image much clearer\n\nExam Tables: The table you sit on to be examined, of course\n\nCoulter Counters: One electronic system for doing complete blood counts\n\nFlame Spectrophotometer: the gadget often used to measure certain electrolytes in the blood, most notably potassium and sodium\n\nSyringe: the thing attached to a needle, that drives medication through the needle into the area targeted\n\n\nI've lost count.  Probably not twenty, but I'm getting tired of typing...
225628
yes you can detect an earthquake. there are all kinds of instruments to help you.
226999
Here ya go : \nhttp://volcano.und.nodak.edu/vwdocs/volc_images/img_fuji.html
145283
Paper (1st century AD)\nCompass (3nd century AD)\nGunpowder(9th century AD)\nSeismometer (to measure earthquakes, 1st century AD)\nStirrups (5th century AD)\nCrossbow (2nd century AD)
279201
Proquest<---is the best\nhttp://www.encyclopedia.com/SearchResults.aspx?Q=Earthquake but maybe this
40475
Heres a few places to start with;\nhttp://www.volcanolive.com/mehetia.html\nhttp://www.swvrc.org/cerupt.htm\nhttp://volcano.und.nodak.edu/vwdocs/volc_images/Mehetia.html
727784
Earthquakes, use jello full of sand, and observe how it shakes when fractured.  Tsunami, create pool of water with a slope as the shore, and watch waves hit shores.  Volcanoes, build sandy hils and use something like coke and mentos to similate lava under pressure, watch it erupt.  Landslides, build sandy hills with steep sides, and watch how slides can occur.  Using nothing more than sand, jello, water, coke and mentos, and with imagination, you can create all these basic "natural disasters".
286404
When there is an earthquake, they can measure it on the other side of the world.  If Earth was one type of solid, the vibrations are a certain way.  Because the vibrations change as they pass through the earth, they can conclude some things, like the core is liquid.  They also drill deep into the earth and pull out samples to see what is down there.  We manage to drill far enough to find oil.
196324
try using geophysics book as your reference.\np (primary) waves travel on solid, liquid and gas mediums.\nS (shear) waves travel only on solid mediums.\nA proof of this, is an occurrence of earthquakes, is which the quake produces seismic waves and the seismic centers can measure this waves and telling the magnitude of an earthquake.\nIf the earth is hollow, they (siesmologists) couldn't measure the magnitude of earthquakes.
544464
A hand held instrument called a velometer. It measures the pressure of the air against a tube and gives a digital readout. Feet per second, Meters per sec.
256787
yes they can and there is a device that is able to detect them, the only thing is that the device has to be over the area that is about to have an earthquake but seeing as they're expensive and there is only a handful of them in the world they dont do any good