Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 23-08-2018 and time 13:05:37 (Italy) in region 5 km SE Montecilfone (CB)

A magnitude ML 2.0 earthquake occured in region: 5 km SE Montecilfone (CB), on

  • 23-08-2018 11:05:37 (UTC)
  • 23-08-2018 13:05:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8670, 14.8750 at 23 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.

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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 5 1348 1348
Guglionesi CB 6 5321 6669
Palata CB 8 1726 8395
Larino CB 8 6793 15188
Guardialfiera CB 10 1065 16253
Tavenna CB 10 718 16971
Acquaviva Collecroce CB 11 672 17643
San Martino in Pensilis CB 11 4793 22436
San Giacomo degli Schiavoni CB 13 1406 23842
Portocannone CB 13 2551 26393
Ururi CB 13 2693 29086
Montenero di Bisaccia CB 13 6675 35761
Montorio nei Frentani CB 13 437 36198
Casacalenda CB 14 2135 38333
Castelmauro CB 14 1505 39838
San Felice del Molise CB 15 634 40472
Montelongo CB 16 365 40837
Mafalda CB 16 1211 42048
Lupara CB 16 505 42553
Campomarino CB 17 7712 50265
Petacciato CB 17 3819 54084
Provvidenti CB 17 119 54203
Rotello CB 17 1212 55415
Civitacampomarano CB 18 417 55832
Termoli CB 18 33739 89571
Castelbottaccio CB 19 312 89883
Bonefro CB 19 1384 91267
Morrone del Sannio CB 19 587 91854
Montemitro CB 19 395 92249
Montefalcone nel Sannio CB 20 1556 93805
Santa Croce di Magliano CB 20 4435 98240

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km W of San Severo (53905 inhabitants)
71 Km NW of Foggia (151991 inhabitants)
79 Km SE of Chieti (51815 inhabitants)
82 Km N of Benevento (60091 inhabitants)
86 Km SE of Pescara (121014 inhabitants)
91 Km W of Manfredonia (57279 inhabitants)
94 Km SE of Montesilvano (53738 inhabitants)
99 Km NE of Caserta (76326 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 2.0 2018-08-23
11:05:37		 41.8668 14.8752 23 2019-04-24
14:50:58		 Bollettino Sismico Italiano INGV 63633211
Reviewed
Rev100 		ML 2.5 2018-08-23
11:05:38		 41.8462 14.8603 10 2018-08-23
11:34:13		 Sala Sismica INGV-Roma 60123181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-23 11:05:37 ± 0.09
Latitude 41.8668 ± 0.0054
Longitude 14.8752 ± 0.0072
Depth (km) 23 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 63633211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 544
Semi-minor axis of confidence ellipse (meter) 495
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.18616
Epicentral distance of station farthest from the epicenter (degree) 0.97397
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 63633211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-12-04 10:17:19

ML:2.5

Field Value
Value 2.5
Uncertainty 0.4
Num. used stations 56
Type of magnitude ML
Reference to an origin 60123181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-23 11:34:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MIDA.HHZ. 2018-08-23T11:05:55.10 0.3 undecidable manual S 244 57.0984 104 -0.04 71
IV.SACR.HHZ. 2018-08-23T11:05:54.66 0.6 undecidable manual S 195 53.9016 105 0.35 46
IV.SNAL.HHZ. 2018-08-23T11:05:54.72 0.1 undecidable manual P 165 108.114 97 -0.5 79
IV.BSSO.HHZ. 2018-08-23T11:05:51.48 0.3 undecidable manual S 213 42.5241 110 0.07 74
IV.INTR.HHZ. 2018-08-23T11:05:50.97 0.1 negative manual P 282 81.6516 99 -0.22 88
IV.VAGA.HHZ. 2018-08-23T11:05:49.54 0.6 undecidable manual P 227 72.9714 101 -0.34 43
IV.TRIV.HHZ. 2018-08-23T11:05:48.23 0.6 undecidable manual S 248 29.0487 121 0.07 51
IV.RNI2.HHZ. 2018-08-23T11:05:48.48 0.1 undecidable manual P 253 62.493 103 0.19 93
IV.LPEL.HHZ. 2018-08-23T11:05:48.11 0.1 undecidable manual P 290 60.495 103 0.12 95
IV.PTRJ.HHZ. 2018-08-23T11:05:47.77 0.6 undecidable manual P 207 62.6928 103 -0.56 41
IV.MELA.HNE. 2018-08-23T11:05:47.85 0.6 undecidable manual S 131 27.4503 123 0.07 51
IV.MIDA.HHZ. 2018-08-23T11:05:47.28 0.1 undecidable manual P 244 57.0984 104 -0.21 92
IV.SACR.HHZ. 2018-08-23T11:05:47.09 0.1 positive manual P 195 53.9016 105 0.08 97
IV.APRC.HHN. 2018-08-23T11:05:47.28 0.1 undecidable manual P 102 56.499 105 -0.12 96
IV.CIGN.HHZ. 2018-08-23T11:05:46.90 0.6 undecidable manual S 174 23.754 127 -0.07 50
IV.FRES.HHZ. 2018-08-23T11:05:46.15 0.6 undecidable manual S 305 20.6682 132 -0.2 49
IV.BSSO.HHZ. 2018-08-23T11:05:45.72 0.1 positive manual P 213 42.5241 110 0.38 93
IV.GATE.HHE. 2018-08-23T11:05:45.08 1.0 undecidable manual P 176 39.3273 112 0.2 24
IV.MELA.HNE. 2018-08-23T11:05:43.36 0.1 undecidable manual P 131 27.4503 123 0.12 100
IV.TRIV.HHZ. 2018-08-23T11:05:43.76 0.3 undecidable manual P 248 29.0487 121 0.3 73
IV.FRES.HHZ. 2018-08-23T11:05:42.44 0.3 undecidable manual P 305 20.6682 132 0.03 78
IV.CIGN.HHZ. 2018-08-23T11:05:42.79 0.3 undecidable manual P 174 23.754 127 0.02 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRES.HHN. ML:2.0 0.0005223025500000001 0.224 AML other m 2018-08-23T11:05:46.76
IV.FRES.HHE. ML:2.4 0.001164082 0.8192 AML other m 2018-08-23T11:05:47.17
IV.BSSO.HNN. ML:1.9 0.00021031185 0.224 AML other m 2018-08-23T11:05:51.80
IV.BSSO.HHN. ML:1.5 0.00008919287 0.224 AML other m 2018-08-23T11:05:51.80
IV.SACR.HHN. ML:1.9 0.0001837213 0.3008 AML other m 2018-08-23T11:05:55.30
IV.SACR.HNN. ML:1.9 0.0001809209 0.32 AML other m 2018-08-23T11:05:55.15
IV.MIDA.HHE. ML:2.1 0.00023882500000000002 0.4416 AML other m 2018-08-23T11:05:55.66
IV.MIDA.HNE. ML:2.1 0.000246164 0.256 AML other m 2018-08-23T11:05:55.66
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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 miniseed + resp format Download