Earthquake with magnitude of Md 4.1 on date 21-03-1998 and time 17:45:09 (Italy) in region 8 km W Monte Cavallo (MC)

A magnitude Md 4.1 earthquake occured in region: 8 km W Monte Cavallo (MC), on

  • 21-03-1998 16:45:09 (UTC)
  • 21-03-1998 17:45:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9780, 12.9060 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
Monte Cavallo MC 8 145 145
Sellano PG 10 1079 1224
Serravalle di Chienti MC 11 1070 2294
Pieve Torina MC 14 1458 3752
Valtopina PG 15 1398 5150
Preci PG 15 724 5874
Visso MC 16 1107 6981
Muccia MC 16 915 7896
Fiordimonte MC 16 202 8098
Foligno PG 17 57155 65253
Trevi PG 17 8469 73722
Pievebovigliana MC 17 866 74588
Cerreto di Spoleto PG 18 1075 75663
Nocera Umbra PG 18 5839 81502
Spello PG 19 8645 90147
Sefro MC 19 422 90569
Ussita MC 19 444 91013

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
51 Km NE of Terni (111501 inhabitants)
74 Km W of Teramo (54892 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
97 Km S of Fano (60888 inhabitants)
99 Km SE of Arezzo (99543 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 4.1
MLNET 4.6
1998-03-21
16:45:09
42.978 12.906 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 325949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1998-03-21 16:45:09 ± 0.136
Latitude 42.9780 ± 0.0137
Longitude 12.9060 ± 0.0232
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 325949

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) 2419.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 59
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.04905
Number of stations at which the event was observed 58
Number of stations from which data was used for origin computation 58
Magnitudes information

Md:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 325949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:05:34

ML:4.6

Field Value
Value 4.6
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 325949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:37:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SOI.Z. 1998-03-21T16:46:32.73 10.0 undecidable manual PN 153 0.0491 1.34 0.4
--.GRI.Z. 1998-03-21T16:46:26.60 10.0 undecidable manual PN! 146 0.0444 1.88 0
--.BNI.Z. 1998-03-21T16:46:24.79 10.0 undecidable manual PN 297 0.0444 0.57 0.8
--.LCI.Z. 1998-03-21T16:46:21.82 10.0 undecidable manual PN 122 0.0423 0.78 0.7
--.MCGN.Z. 1998-03-21T16:46:20.64 10.0 undecidable manual PN 312 0.0414 0.96 0.7
--.CGL.Z. 1998-03-21T16:46:19.67 10.0 undecidable manual PN 218 0.0406 1.1 0.6
--.ORO.Z. 1998-03-21T16:46:18.10 10.0 undecidable manual PN 308 0.0396 1.09 0.6
--.DOI.Z. 1998-03-21T16:46:16.60 10.0 undecidable manual PN 292 0.0392 -0.34 1
--.TDS.Z. 1998-03-21T16:46:14.85 10.0 undecidable manual PN 141 0.0377 0.7 0.9
--.BR9.Z. 1998-03-21T16:46:12.10 10.0 undecidable manual PN 333 0.0354 1.52 0.4
--.ORI.Z. 1998-03-21T16:46:11.26 10.0 undecidable manual PN 136 0.0355 0.58 0.9
--.LT9.Z. 1998-03-21T16:46:09.15 10.0 undecidable manual PN 127 0.0338 1.03 0.7
--.BRT.Z. 1998-03-21T16:46:08.74 10.0 undecidable manual PN 122 0.0341 0.18 1.1
--.CKI.Z. 1998-03-21T16:46:06.77 10.0 undecidable manual PN 295 0.0327 0.27 1.1
--.FVI.Z. 1998-03-21T16:46:06.13 10.0 undecidable manual PN 358 0.0325 -0.02 1.2
--.PTCC.Z. 1998-03-21T16:46:03.54 10.0 undecidable manual PN 5 0.0309 -0.21 1.2
--.SL9.Z. 1998-03-21T16:46:03.11 10.0 undecidable manual PN 141 0.0295 1.41 0.5
--.GE9.Z. 1998-03-21T16:46:02.00 10.0 undecidable manual PN 2 0.0297 0.12 1.2
--.SAL.Z. 1998-03-21T16:46:01.80 10.0 undecidable manual PN 328 0.0282 1.57 0.4
--.CTI.Z. 1998-03-21T16:46:00.85 10.0 undecidable manual PN 344 0.0287 0.45 1.1
--.VVI.Z. 1998-03-21T16:45:58.35 10.0 undecidable manual PN 353 0.0271 0.35 1.2
--.BOB.Z. 1998-03-21T16:45:57.47 10.0 undecidable manual PN 307 0.0275 -1.15 0.7
--.MU9.Z. 1998-03-21T16:45:57.91 10.0 undecidable manual PN 138 0.0264 1.13 0.7
--.SGO.Z. 1998-03-21T16:45:57.84 10.0 undecidable manual PN 142 0.0270 0.03 1.3
--.CA9.Z. 1998-03-21T16:45:55.50 10.0 undecidable manual PN 137 0.0252 0.48 1.2
--.TRI.Z. 1998-03-21T16:45:54.99 10.0 positive manual PN 12 0.0252 0.06 2.7
--.FG4.Z. 1998-03-21T16:45:53.84 10.0 undecidable manual PN 132 0.0240 0.59 1.2
--.FG3.Z. 1998-03-21T16:45:52.87 10.0 undecidable manual PN 118 0.0232 0.91 1
--.CI9.Z. 1998-03-21T16:45:52.82 10.0 undecidable manual PN 142 0.0237 0.09 1.4
--.FG5.Z. 1998-03-21T16:45:49.87 10.0 undecidable manual PN 133 0.0219 -0.09 1.4
--.EB9.Z. 1998-03-21T16:45:49.48 10.0 undecidable manual PN 309 0.0207 1.29 0.7
--.PSB1.Z. 1998-03-21T16:45:48.83 10.0 undecidable manual PN 140 0.0202 1.4 0.6
--.SMB1.Z. 1998-03-21T16:45:46.44 10.0 undecidable manual PN 139 0.0186 1.44 0.5
--.VTB1.Z. 1998-03-21T16:45:46.83 10.0 undecidable manual PN 144 0.0198 0.07 1.4
--.MAB1.Z. 1998-03-21T16:45:46.47 10.0 undecidable manual PN 145 0.0187 1.35 0.6
--.GU9.Z. 1998-03-21T16:45:46.67 10.0 undecidable manual PN 310 0.0194 0.42 1.3
--.ZC9.Z. 1998-03-21T16:45:45.20 10.0 undecidable manual PN 315 0.0176 1.63 0.4
--.FG2.Z. 1998-03-21T16:45:44.29 10.0 undecidable manual PN 124 0.0183 -0.18 1.4
--.BDI.Z. 1998-03-21T16:45:43.57 10.0 undecidable manual PN 303 0.0179 -0.32 1.4
--.PII.Z. 1998-03-21T16:45:43.53 10.0 undecidable manual PN 294 0.0169 1.15 0.8
--.RFI.Z. 1998-03-21T16:45:42.59 10.0 undecidable manual PN 154 0.0167 0.57 1.2
--.DUI.Z. 1998-03-21T16:45:39.78 10.0 undecidable manual PN 138 0.0157 -0.73 1.1
--.CRVI.Z. 1998-03-21T16:45:38.35 10.0 undecidable manual PN 140 0.0146 -0.48 1.3
--.GRFL.Z. 1998-03-21T16:45:35.23 10.0 undecidable manual PN 277 0.0127 -0.78 1.1
--.SDI.Z. 1998-03-21T16:45:35.49 10.0 undecidable manual PN 152 0.0129 -0.7 1.1
--.CSNT.Z. 1998-03-21T16:45:33.43 10.0 undecidable manual PN 293 0.0114 -0.61 1.2
--.SFI.Z. 1998-03-21T16:45:32.74 10.0 undecidable manual PN 320 0.0108 -0.3 1.4
--.RMP.Z. 1998-03-21T16:45:30.38 10.0 undecidable manual PN 187 0.0105 -2.28 0.1
--.RSM.Z. 1998-03-21T16:45:29.60 10.0 undecidable manual PG 341 0.0090 -0.39 1.3
--.CRE.Z. 1998-03-21T16:45:28.00 10.0 undecidable manual PG 313 0.0085 -0.87 1
--.ARV.Z. 1998-03-21T16:45:28.25 10.0 undecidable manual SG 3 0.0047 -1.05 0.5
--.PQ9.Z. 1998-03-21T16:45:28.50 10.0 undecidable manual PG 159 0.0091 -1.79 0.3
--.FB9.Z. 1998-03-21T16:45:23.35 10.0 positive manual PG 352 0.0065 -1.34 1.2
--.AQU.Z. 1998-03-21T16:45:22.27 10.0 undecidable manual PG 149 0.0065 -2.45 0.1
--.MNS.Z. 1998-03-21T16:45:20.59 10.0 positive manual PG 195 0.0055 -2.15 0.3
--.ARV.Z. 1998-03-21T16:45:19.74 10.0 positive manual PG 3 0.0047 -1.27 1.3
--.SNTG.Z. 1998-03-21T16:45:15.43 10.0 positive manual PG 5 0.0024 -0.52 2.5
--.ASS.Z. 1998-03-21T16:45:14.30 10.0 positive manual PG 294 0.0018 -0.29 2.7
--.NRCA.Z. 1998-03-21T16:45:13.40 10.0 positive manual PG 133 0.0019 -1.04 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