Earthquake with magnitude of Md 3.0 on date 06-08-1991 and time 13:31:02 (Italy) in region 2 km W Servigliano (FM)

A magnitude Md 3.0 earthquake occured in region: 2 km W Servigliano (FM), on

  • 06-08-1991 11:31:02 (UTC)
  • 06-08-1991 13:31:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0740, 13.4650 at 5 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
Servigliano FM 2 2336 2336
Penna San Giovanni MC 4 1108 3444
Falerone FM 4 3337 6781
Monte San Martino MC 5 765 7546
Monte Vidon Corrado FM 6 731 8277
Monteleone di Fermo FM 6 395 8672
Sant'Angelo in Pontano MC 6 1436 10108
Belmonte Piceno FM 6 646 10754
Santa Vittoria in Matenano FM 7 1330 12084
Montappone FM 7 1682 13766
Monsampietro Morico FM 8 659 14425
Smerillo FM 8 365 14790
Montelparo FM 8 778 15568
Massa Fermana FM 9 963 16531
Montegiorgio FM 9 6851 23382
Montefalcone Appennino FM 10 424 23806
Montottone FM 10 979 24785
Gualdo MC 10 815 25600
Monte Rinaldo FM 11 379 25979
Ripe San Ginesio MC 11 852 26831
Loro Piceno MC 11 2401 29232
Grottazzolina FM 12 3398 32630
Magliano di Tenna FM 12 1452 34082
Force AP 12 1354 35436
Ortezzano FM 13 774 36210
Mogliano MC 13 4696 40906
San Ginesio MC 13 3498 44404
Colmurano MC 13 1263 45667
Comunanza AP 14 3166 48833
Amandola FM 14 3629 52462
Monte Giberto FM 14 801 53263
Monte Vidon Combatte FM 14 433 53696
Sarnano MC 14 3264 56960
Rapagnano FM 14 2145 59105
Francavilla d'Ete FM 15 964 60069
Montalto delle Marche AP 15 2122 62191
Montedinove AP 15 488 62679
Rotella AP 15 906 63585
Urbisaglia MC 16 2628 66213
Petritoli FM 16 2335 68548
Ponzano di Fermo FM 16 1674 70222
Monte San Pietrangeli FM 16 2458 72680
Petriolo MC 17 1998 74678
Torre San Patrizio FM 17 2048 76726
Cessapalombo MC 17 512 77238
Camporotondo di Fiastrone MC 17 563 77801
Montefortino FM 18 1178 78979
Carassai AP 18 1100 80079
Palmiano AP 19 196 80275
Castignano AP 20 2796 83071
Corridonia MC 20 15430 98501

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km NW of Teramo (54892 inhabitants)
61 Km S of Ancona (100861 inhabitants)
63 Km E of Foligno (57155 inhabitants)
80 Km N of L'Aquila (69753 inhabitants)
84 Km NW of Montesilvano (53738 inhabitants)
87 Km E of Perugia (166134 inhabitants)
88 Km NE of Terni (111501 inhabitants)
91 Km NW of Pescara (121014 inhabitants)
93 Km SE of Fano (60888 inhabitants)
99 Km NW of Chieti (51815 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.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is 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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 3.0
ML-VAX 2.1
1991-08-06
11:31:02
43.074 13.465 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 147009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-08-06 11:31:02 ± 0.4
Latitude 43.0740 ± 0.0189
Longitude 13.4650 ± 0.0374
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 147009

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 3689.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 210
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00510
Epicentral distance of station farthest from the epicenter (degree) 0.01344
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:3.0

Field Value
Value 3.0
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 147009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:17:12

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 147009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 1991-08-06T11:31:47.54 10.0 undecidable manual SN 168 0.0125 -0.16 0.6
--.MNS.Z. 1991-08-06T11:31:35.84 10.0 undecidable manual SG 219 0.0080 1.29 0.2
--.SFI.Z. 1991-08-06T11:31:30.73 10.0 undecidable manual PN 305 0.0129 1.32 0.3
--.PGD.Z. 1991-08-06T11:31:30.00 10.0 undecidable manual PN 302 0.0134 -0.23 1.4
--.SDI.Z. 1991-08-06T11:31:28.44 10.0 undecidable manual PN 168 0.0125 -0.3 1.4
--.CRE.Z. 1991-08-06T11:31:27.32 10.0 undecidable manual PN 296 0.0110 0.77 0.9
--.ASS.Z. 1991-08-06T11:31:25.10 10.0 undecidable manual SG 268 0.0053 0.32 0.7
--.ARV.Z. 1991-08-06T11:31:24.13 10.0 undecidable manual SG 318 0.0051 0.14 0.7
--.MNS.Z. 1991-08-06T11:31:21.21 10.0 undecidable manual PG 219 0.0080 0.05 1.8
--.ARV.Z. 1991-08-06T11:31:14.52 10.0 undecidable manual PG 318 0.0051 -0.54 1.4
--.ASS.Z. 1991-08-06T11:31:14.61 10.0 negative manual PG 268 0.0053 -0.9 1.7
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
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download