Earthquake with magnitude of ML 0.1 on date 20-10-2013 and time 17:43:39 (Italy) in region 9 km E Foligno (PG)

A magnitude ML 0.1 earthquake occured in region: 9 km E Foligno (PG), on

  • 20-10-2013 15:43:39 (UTC)
  • 20-10-2013 17:43:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.96, 12.81 at 12 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Foligno PG 9 57155 57155
Trevi PG 10 8469 65624
Spello PG 12 8645 74269
Valtopina PG 12 1398 75667
Sellano PG 12 1079 76746
Montefalco PG 15 5679 82425
Campello sul Clitunno PG 16 2442 84867
Monte Cavallo MC 16 145 85012
Bevagna PG 17 5081 90093
Nocera Umbra PG 17 5839 95932
Serravalle di Chienti MC 17 1070 97002
Cerreto di Spoleto PG 18 1075 98077
Castel Ritaldi PG 19 3278 101355
Cannara PG 19 4305 105660

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Foligno (57155 inhabitants)
38 Km E of Perugia (166134 inhabitants)
46 Km N of Terni (111501 inhabitants)
80 Km W of Teramo (54892 inhabitants)
83 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
100 Km S of Fano (60888 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 0.1 2013-10-20
15:43:39
42.9603 12.8103 12 2015-01-20
11:29:30
Bollettino Sismico Italiano INGV 4919211
Reviewed
Rev100
ML 0.1 2013-10-20
15:43:40
42.9788 12.8143 11 2014-10-21
12:08:56
Sala Sismica INGV-Roma 4699051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-10-20 15:43:39 ± 0.1
Latitude 42.9603 ± 0.0063
Longitude 12.8103 ± 0.0061
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4919211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 615
Semi-minor axis of confidence ellipse (meter) 521
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 132
Circular confidence region, given by single value of horizontal uncertainty (meter) 620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.31656
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.1

Field Value
Value 0.1
Uncertainty 0.4
Num. used stations 1
Type of magnitude ML
Reference to an origin 4919211
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:05:46

ML:0.1

Field Value
Value 0.1
Uncertainty 0.4
Num. used stations 1
Type of magnitude ML
Reference to an origin 4699051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-10-20 15:53:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2013-10-20T15:43:51.93 0.3 undecidable manual S 65 0.3166 93 0.27 69
IV.MOMA.HHE. 2013-10-20T15:43:49.43 0.3 undecidable manual S 228 0.2383 94 0.09 74
IV.FDMO.HHZ. 2013-10-20T15:43:48.53 0.3 undecidable manual S 69 0.2158 95 -0.16 71
IV.CSP1.EHZ. 2013-10-20T15:43:46.72 0.3 undecidable manual P 65 0.3166 93 0.07 72
IV.ASSB.HHZ. 2013-10-20T15:43:46.31 0.3 undecidable manual S 307 0.1376 107 -0.1 74
IV.MOMA.HHE. 2013-10-20T15:43:45.21 0.3 undecidable manual P 228 0.2383 94 -0.1 71
IV.FDMO.HHZ. 2013-10-20T15:43:44.88 0.3 undecidable manual P 69 0.2158 95 -0.06 73
IV.CESI.HHZ. 2013-10-20T15:43:44.87 0.1 undecidable manual S 57 0.0818 131 -0.08 100
IV.ASSB.HHZ. 2013-10-20T15:43:43.68 0.1 undecidable manual P 307 0.1376 107 0.06 99
IV.CESI.HHZ. 2013-10-20T15:43:42.89 0.1 undecidable manual P 57 0.0818 131 0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.4 3.32E-5 0.06 AML other m 2013-10-20T15:43:45.12
IV.CESI.HHE. ML:-0.2 8.075E-6 0.6 AML other m 2013-10-20T15:43:45.05
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download