INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.9 on date 18-09-2018 and time 18:33:43 (Italy) in region 6 km SE Montecilfone (CB)

A magnitude ML 0.9 earthquake occured in region: 6 km SE Montecilfone (CB), on

  • 18-09-2018 16:33:43 (UTC)
  • 18-09-2018 18:33:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.86, 14.88 at 11 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 6 1348 1348
Guglionesi CB 6 5321 6669
Larino CB 7 6793 13462
Palata CB 9 1726 15188
Guardialfiera CB 10 1065 16253
San Martino in Pensilis CB 11 4793 21046
Acquaviva Collecroce CB 11 672 21718
Tavenna CB 12 718 22436
Montorio nei Frentani CB 12 437 22873
Ururi CB 12 2693 25566
Portocannone CB 12 2551 28117
San Giacomo degli Schiavoni CB 13 1406 29523
Casacalenda CB 13 2135 31658
Montenero di Bisaccia CB 14 6675 38333
Montelongo CB 15 365 38698
Castelmauro CB 15 1505 40203
San Felice del Molise CB 16 634 40837
Rotello CB 16 1212 42049
Provvidenti CB 16 119 42168
Lupara CB 16 505 42673
Campomarino CB 17 7712 50385
Mafalda CB 17 1211 51596
Petacciato CB 18 3819 55415
Bonefro CB 18 1384 56799
Civitacampomarano CB 18 417 57216
Santa Croce di Magliano CB 18 4435 61651
Morrone del Sannio CB 18 587 62238
Termoli CB 19 33739 95977
Castelbottaccio CB 19 312 96289
Ripabottoni CB 20 514 96803
Montemitro CB 20 395 97198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km W of San Severo (53905 inhabitants)
70 Km NW of Foggia (151991 inhabitants)
81 Km SE of Chieti (51815 inhabitants)
81 Km N of Benevento (60091 inhabitants)
87 Km SE of Pescara (121014 inhabitants)
90 Km W of Manfredonia (57279 inhabitants)
95 Km SE of Montesilvano (53738 inhabitants)
98 Km NE of Caserta (76326 inhabitants)
Recent and historical Seismicity
Seismic hazard
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 0.9 2018-09-18
16:33:43
41.86 14.88 11 2018-09-18
16:36:27
Sala Sismica INGV-Roma 61075991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-18 16:33:43 ± 0.57
Latitude 41.86 ± 0.04
Longitude 14.88 ± 0.02
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61075991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4239
Semi-minor axis of confidence ellipse (meter) 692
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 4240
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 223
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.23652
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 3
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 61075991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-18 16:36:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.APEC.HHZ. 2018-09-18T16:34:32.11 3.0 undecidable manual Sn 0.18 0
IV.FDMO.HHZ. 2018-09-18T16:34:19.52 3.0 undecidable manual Sn 2.26 0
IV.MCRV.HHZ. 2018-09-18T16:34:16.64 3.0 undecidable manual Sg 0.07 0
IV.COR1.EHZ. 2018-09-18T16:34:13.51 3.0 positive manual Pg 12.19 0
IV.VENT.EHZ. 2018-09-18T16:33:55.47 3.0 undecidable manual P -0.05 0
IV.MELA.HHZ. 2018-09-18T16:33:53.33 0.3 undecidable manual S 130 0.2365 50 0.16 71
YD.T1412.EHZ. 2018-09-18T16:33:49.41 0.1 undecidable manual S 230 0.1142 130 0.02 100
IV.MELA.HHZ. 2018-09-18T16:33:48.94 0.1 undecidable manual P 130 0.2365 50 -0.2 94
YD.T1413.EHZ. 2018-09-18T16:33:48.82 0.1 undecidable manual S 93 0.0989 134 -0.12 98
YD.T1413.EHZ. 2018-09-18T16:33:47.17 0.6 undecidable manual P 93 0.0989 134 0.47 46
YD.T1412.EHZ. 2018-09-18T16:33:46.91 0.6 positive manual P 230 0.1142 130 -0.05 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
YD.T1412.EHE. ML:0.8 6.6455E-5 0.16 AML other m 2018-09-18T16:33:49.72
YD.T1412.EHN. ML:0.9 9.025E-5 0.14 AML other m 2018-09-18T16:33:50.44
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download