INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 2.1 on date 20-09-2018 and time 06:25:49 (Italy) in region 3 km SE Montecilfone (CB)

A magnitude ML 2.1 earthquake occured in region: 3 km SE Montecilfone (CB), on

  • 20-09-2018 04:25:49 (UTC)
  • 20-09-2018 06:25:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.88, 14.86 at 16 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Montecilfone CB 3 1348 1348
Guglionesi CB 6 5321 6669
Palata CB 6 1726 8395
Tavenna CB 9 718 9113
Acquaviva Collecroce CB 9 672 9785
Larino CB 10 6793 16578
Guardialfiera CB 10 1065 17643
Montenero di Bisaccia CB 11 6675 24318
San Giacomo degli Schiavoni CB 12 1406 25724
San Martino in Pensilis CB 13 4793 30517
San Felice del Molise CB 13 634 31151
Portocannone CB 13 2551 33702
Castelmauro CB 13 1505 35207
Mafalda CB 14 1211 36418
Ururi CB 15 2693 39111
Montorio nei Frentani CB 15 437 39548
Petacciato CB 15 3819 43367
Casacalenda CB 16 2135 45502
Lupara CB 17 505 46007
Campomarino CB 17 7712 53719
Montemitro CB 18 395 54114
Montelongo CB 18 365 54479
Civitacampomarano CB 18 417 54896
Termoli CB 18 33739 88635
Provvidenti CB 18 119 88754
Montefalcone nel Sannio CB 18 1556 90310
Castelbottaccio CB 19 312 90622
Rotello CB 19 1212 91834
Fresagrandinaria CH 19 961 92795
Tufillo CH 20 406 93201
Dogliola CH 20 359 93560
Morrone del Sannio CB 20 587 94147

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km W of San Severo (53905 inhabitants)
73 Km NW of Foggia (151991 inhabitants)
78 Km SE of Chieti (51815 inhabitants)
84 Km N of Benevento (60091 inhabitants)
84 Km SE of Pescara (121014 inhabitants)
92 Km SE of Montesilvano (53738 inhabitants)
92 Km W of Manfredonia (57279 inhabitants)
100 Km NE of Caserta (76326 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 2.1 2018-09-20
04:25:49
41.88 14.86 16 2018-09-20
04:35:16
Sala Sismica INGV-Roma 61131761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-20 04:25:49 ± 0.21
Latitude 41.88 ± 0.01
Longitude 14.86 ± 0.01
Depth (km) 16 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61131761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1462
Semi-minor axis of confidence ellipse (meter) 375
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
Circular confidence region, given by single value of horizontal uncertainty (meter) 1460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.03782
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 13
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 61131761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-20 04:35:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PLLN.EHZ. 2018-09-20T04:27:42.41 3.0 undecidable manual Sg 5.28 0
MN.TRI.HHZ. 2018-09-20T04:27:33.42 3.0 undecidable manual Sn -0.37 0
IV.SACS.HHZ. 2018-09-20T04:27:05.29 3.0 undecidable manual Sg 8.51 0
IV.APEC.HHZ. 2018-09-20T04:27:01.06 3.0 undecidable manual Sn 2.84 0
NI.PALA.HHZ. 2018-09-20T04:26:58.20 3.0 undecidable manual Pn 0.87 0
IV.MGR.HHZ. 2018-09-20T04:26:46.53 3.0 undecidable manual Sg 0.34 0
AC.PUK.HHZ. 2018-09-20T04:26:44.84 3.0 negative manual Pn -2.78 0
IV.MODR.HHZ. 2018-09-20T04:26:18.97 0.1 undecidable manual P 1.0378 1.049 0
IV.VCEL.EHZ. 2018-09-20T04:26:18.04 0.1 undecidable manual S 305 0.9137 93 -0.81 73
IV.INTR.HHZ. 2018-09-20T04:26:12.66 0.3 undecidable manual S 281 0.7213 94 -0.51 63
IV.RNI2.HHZ. 2018-09-20T04:26:09.11 0.6 undecidable manual S 252 0.5558 96 0.85 39
IV.VCEL.EHZ. 2018-09-20T04:26:09.66 0.6 positive manual P 305 0.9137 93 3.3 2
IV.LPEL.HHZ. 2018-09-20T04:26:08.12 0.3 undecidable manual S 289 0.5297 96 0.62 63
IV.SGRT.HHZ. 2018-09-20T04:26:02.02 0.1 undecidable manual P 100 0.6709 94 -0.19 93
IV.INTR.HHZ. 2018-09-20T04:26:02.78 0.1 positive manual P 281 0.7213 94 -0.3 89
IV.RNI2.HHZ. 2018-09-20T04:26:00.59 0.6 positive manual P 252 0.5558 96 0.34 46
IV.APRC.HHZ. 2018-09-20T04:25:59.44 1.0 positive manual P 103 0.5234 96 -0.27 24
IV.LPEL.HHZ. 2018-09-20T04:25:59.94 0.3 positive manual P 289 0.5297 96 0.14 72
IV.CIGN.HHZ. 2018-09-20T04:25:58.50 0.3 undecidable manual S 171 0.2284 109 -0.22 75
IV.TRIV.HHZ. 2018-09-20T04:25:58.79 0.3 undecidable manual S 244 0.2563 106 -0.74 63
IV.GATE.HHZ. 2018-09-20T04:25:57.62 0.1 undecidable manual P 174 0.3687 99 0.55 90
IV.TRIV.HHZ. 2018-09-20T04:25:55.74 0.6 negative manual P 244 0.2563 106 0.54 46
IV.MELA.HHZ. 2018-09-20T04:25:54.81 1.0 undecidable manual P 131 0.2644 105 -0.53 23
IV.CIGN.HHZ. 2018-09-20T04:25:54.51 0.1 undecidable manual P 171 0.2284 109 -0.23 100
IV.FRES.HHZ. 2018-09-20T04:25:54.46 0.1 positive manual P 304 0.1691 118 0.64 89
YD.T1413.HNZ. 2018-09-20T04:25:53.17 0.3 negative manual P 103 0.1205 131 0.04 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRES.HHN. ML:1.7 0.0003285 0.14 AML other m 2018-09-20T04:25:54.88
IV.FRES.HHE. ML:1.8 0.0004195 1 AML other m 2018-09-20T04:25:55.18
YD.T1413.HNE. ML:2.2 0.00142 0.24 AML other m 2018-09-20T04:26:04.78
YD.T1413.EHE. ML:2.2 0.001177 0.24 AML other m 2018-09-20T04:26:04.76
YD.T1413.EHN. ML:2.6 0.003545 0.44 AML other m 2018-09-20T04:26:04.70
YD.T1413.HNN. ML:2.6 0.003605 0.42 AML other m 2018-09-20T04:26:04.71
IV.CIGN.HHE. ML:1.9 0.000413 0.52 AML other m 2018-09-20T04:26:07.86
IV.MELA.HHN. ML:2.4 0.001044 1.68 AML other m 2018-09-20T04:26:08.87
IV.MELA.HNN. ML:2.3 0.0009685 1.68 AML other m 2018-09-20T04:26:08.87
IV.MELA.HNE. ML:2.1 0.000607 1.34 AML other m 2018-09-20T04:26:08.90
IV.TRIV.HHE. ML:1.7 0.000235 1.1 AML other m 2018-09-20T04:26:09.92
IV.MELA.HHE. ML:2.1 0.000595 0.8 AML other m 2018-09-20T04:26:09.42
IV.TRIV.HHN. ML:1.9 0.0003515 0.88 AML other m 2018-09-20T04:26:09.89
IV.TRIV.HNN. ML:1.8 0.0003215 0.86 AML other m 2018-09-20T04:26:09.89
IV.CIGN.HHN. ML:1.9 0.000405 0.36 AML other m 2018-09-20T04:26:09.54
IV.TRIV.HNE. ML:1.7 0.0002125 1.64 AML other m 2018-09-20T04:26:10.92
IV.GATE.HNE. ML:1.9 0.000254 1.58 AML other m 2018-09-20T04:26:13.97
IV.GATE.HHE. ML:1.9 0.000244 0.42 AML other m 2018-09-20T04:26:14.98
IV.GATE.HHN. ML:1.7 0.0001615 0.62 AML other m 2018-09-20T04:26:15.50
IV.RNI2.HHN. ML:2 0.000207 0.98 AML other m 2018-09-20T04:26:17.67
IV.APRC.HHN. ML:2.2 0.000307 0.54 AML other m 2018-09-20T04:26:18.11
IV.LPEL.HHN. ML:2.1 0.000275 0.14 AML other m 2018-09-20T04:26:18.89
IV.APRC.HHE. ML:2 0.000222 0.16 AML other m 2018-09-20T04:26:19.10
IV.RNI2.HHE. ML:2.1 0.000231 0.16 AML other m 2018-09-20T04:26:19.15
IV.LPEL.HHE. ML:2.1 0.000234 0.18 AML other m 2018-09-20T04:26:20.00
IV.GATE.HNN. ML:1.8 0.0001865 0.68 AML other m 2018-09-20T04:26:20.59
IV.SGRT.HHE. ML:2.2 0.000232 1.62 AML other m 2018-09-20T04:26:22.94
IV.INTR.HHE. ML:1.8 8.215E-5 0.62 AML other m 2018-09-20T04:26:23.17
IV.INTR.HNE. ML:2.1 0.000184 0.62 AML other m 2018-09-20T04:26:23.17
IV.INTR.HHN. ML:2.2 0.0001905 0.18 AML other m 2018-09-20T04:26:23.62
IV.SGRT.HHN. ML:2.2 0.000228 1.74 AML other m 2018-09-20T04:26:25.91
IV.INTR.HNN. ML:2.2 0.000203 0.74 AML other m 2018-09-20T04:26:31.53
IV.VCEL.EHE. ML:2.4 0.0002365 1.66 AML other m 2018-09-20T04:26:33.96
IV.VCEL.EHN. ML:2.3 0.0001845 1.72 AML other m 2018-09-20T04:26:33.13
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://cnt.rm.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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
Waveforms Seismic signals in full SEED format Download