Earthquake Information Brief for Jan. 21, 2014

Commander, Naval Support Activity Naples, Italy

20 January 2014 Earthquake Sean Quinn

Steve Ursell

Emergency Management Officer

Installation Training Officer

DSN: 626-6897

DSN: 626-3948

E-mail: sean.quinn@eu.navy.mil

E-mail: Steven.Ursell@eu.navy.mil

Overview • Briefing purpose.

• Richter and Mercalli scale discussion.

• Recent Italian earthquakes.

• Attenuation.

• Earthquake sensor locations.

• (Vesuvius) sensor locations.

• 29 Dec 2013 and 23 Nov 1980 Irpinia earthquakes compared.

• Helpful links.

Purpose • Provide introduction to earthquakes.

• Increase situational awareness.

• Make available handy links to important information.

• This briefing is informational in nature, not a decision brief.

Richter and Mercalli Scale Discussion • Richter Scale: • Logarithmic.

• A level 6 earthquake is 10 times greater than a level 5 earthquake.

• A level 7 earthquake is 100 times greater than a level 5 earthquake.

• Richter scale ratings are determined soon after an earthquake.

• Mercalli Scale: • Subjective interpretations.

• A low intensity earthquake (II) is one in which only some people feel the vibration and there is no significant property damage.

• The highest rating (XII) is applied to earthquakes in which structures are destroyed, the ground is cracked and landslides are initiated.

• Mercalli ratings can't be determined until investigators have had time to talk to many eyewitnesses to find out what occurred during the earthquake.

• Online reporting: http://www.haisentitoilterremoto.it/xml-server.php

• Richter Scale magnitude comparison calculator.

• http://earthquake.usgs.gov/learn/topics/calculator.php/

Recent Italian Earthquakes •

29 Dec 2013 (4.9) - Epicenter Near Cusano Mutri, Italy, N41.37 E14.45 -- 4.9, 1808L, Felt at Support Site, Capodichino, Naples -- 2.0 – 3.7, 1814L to 2336L, 32+ Events

•

20 Jan 2014 (4.2) - Epicenter Near Cusano Mutri, Italy, N41.36 E14.45 -- Approx 40 Miles from Capodichino -- Approx 32 Miles from Support Site - 4.2, 0812L, Felt at Support Site, Capodichino, Naples - 3.7, 0855L, Felt at Support Site - 1.5 – 2.5, 0750L to 1948L, 15 Events

•

Earthquake Risk: Naples is at Low Risk

Attenuation (USGS Graphics) Quake begins Station 1 Quake begins near Station 1

Station 1 Registers quake

Station 2 registers quake

Quake registers at Station 2

INGV Earthquake Sensor Locations

29 Dec 2013 & 20 Jan 2014

(Vesuvius) Sensor Locations SGG STH BAC OC9

The Vesuvius observatory maintains its own sensor network.

OVO BKE

Earthquakes Compared •

29 Dec 2013 (1808L).

•

Richter scale.

• •

• • • • • •

40 miles from Capo.

Recorded by Vesuvius sensors.

No damage reported in Naples.

San Gregorio Matese water interrupted (near epicenter).

Multiple localities reported minor damage to historical buildings.

Aftershocks within 24-hours.

• •

•

Italian (INGV): 4.9.

U.S. (USGS): 5.2.

Magnitude > 2: 55.

Magnitude > 3: 6.

23 Nov 1980 Irpinia.

• • •

Richter scale: 6.89.

50 miles from Capo.

Destroyed buildings in Naples.

Irpinia earthquake was 1000 times greater than the 29 Dec 2013 earthquake.

Helpful Links (Active in Presentation Mode) • Data resources.

• INGV (Istituto Nazionale di Geofisica e Vulcanologia).

• Homepage. http://www.ov.ingv.it/ov/index.php

• Vesuvius area sensor output (see sensor location map). http://portale.ov.ingv.it/webdata/segnali_rt.asp?loc=Pozzuoli&IdMap=3&sta=STH&comp=V&A=2.82&B=0 &C=-2.46&t=GMT&id=6

• Campi Flegrei report (Comunicati e Bollettini settimanali). http://www.ov.ingv.it/ov/en/campi-flegrei.html

• USGS (U.S. Geological Survey) earthquake listing. http://earthquake.usgs.gov/earthquakes/map/

• Listing of over 40 world-wide live seismograms. http://sismic.iec.cat/earthquakes/live_seismograms.html

• Protezione Civile. http://www.protezionecivile.gov.it/jcms/

• Want to report your experience? http://www.haisentitoilterremoto.it/xml-server.php Tip: Pasting Italian language links into Google translate provides a rough English language version of the text.