Earthquake with magnitude of ML 1.5 on date 20-08-2018 and time 04:01:59 (Italy) in region 3 km SE Montecilfone (CB)

A magnitude ML 1.5 earthquake occured in region: 3 km SE Montecilfone (CB), on

  • 20-08-2018 02:01:59 (UTC)
  • 20-08-2018 04:01:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.88, 14.85 at 22 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
Montecilfone CB 3 1348 1348
Palata CB 5 1726 3074
Guglionesi CB 6 5321 8395
Tavenna CB 8 718 9113
Acquaviva Collecroce CB 9 672 9785
Guardialfiera CB 10 1065 10850
Montenero di Bisaccia CB 10 6675 17525
Larino CB 10 6793 24318
San Felice del Molise CB 12 634 24952
San Giacomo degli Schiavoni CB 12 1406 26358
Castelmauro CB 13 1505 27863
Mafalda CB 13 1211 29074
San Martino in Pensilis CB 13 4793 33867
Portocannone CB 14 2551 36418
Petacciato CB 15 3819 40237
Montorio nei Frentani CB 15 437 40674
Ururi CB 15 2693 43367
Casacalenda CB 16 2135 45502
Lupara CB 16 505 46007
Montemitro CB 17 395 46402
Civitacampomarano CB 17 417 46819
Campomarino CB 17 7712 54531
Montefalcone nel Sannio CB 18 1556 56087
Provvidenti CB 18 119 56206
Montelongo CB 18 365 56571
Termoli CB 18 33739 90310
Castelbottaccio CB 18 312 90622
Fresagrandinaria CH 19 961 91583
Tufillo CH 19 406 91989
Dogliola CH 19 359 92348
Lentella CH 19 689 93037
Rotello CB 20 1212 94249
Morrone del Sannio CB 20 587 94836

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km W of San Severo (53905 inhabitants)
74 Km NW of Foggia (151991 inhabitants)
77 Km SE of Chieti (51815 inhabitants)
83 Km SE of Pescara (121014 inhabitants)
84 Km N of Benevento (60091 inhabitants)
91 Km SE of Montesilvano (53738 inhabitants)
93 Km W of Manfredonia (57279 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
Rev 1000 ML 1.5 2018-08-20
02:01:59
41.88 14.85 22 2019-04-24
14:51:18
Bollettino Sismico Italiano INGV 67215341
Rev 100 ML 1.0 2018-08-20
02:02:00
41.82 14.82 13 2018-08-20
02:06:30
Sala Sismica INGV-Roma 59984261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-20 02:01:59 ± 0.15
Latitude 41.88 ± 0.01
Longitude 14.85 ± 0.01
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 67215341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 568
Semi-minor axis of confidence ellipse (meter) 477
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 125
Circular confidence region, given by single value of horizontal uncertainty (meter) 570
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.08633
Epicentral distance of station farthest from the epicenter (degree) 0.67809
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 67215341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-03 08:05:46

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 59984261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-20 02:06:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BSSO.HHE. 2018-08-20T02:02:14.59 0.6 undecidable manual S 210 0.3858 110 0.38 44
IV.SGRT.HHZ. 2018-08-20T02:02:13.13 0.3 undecidable manual P 100 0.6781 100 0.17 65
IV.MELA.HHZ. 2018-08-20T02:02:10.96 0.6 undecidable manual S 130 0.2716 119 -0.15 48
IV.BSSO.HHE. 2018-08-20T02:02:08.12 0.1 undecidable manual P 210 0.3858 110 0 95
IV.FRES.HHZ. 2018-08-20T02:02:08.20 0.6 undecidable manual S 304 0.1628 136 -0.34 46
YD.T1411.EHZ. 2018-08-20T02:02:07.33 0.3 undecidable manual S 41 0.0863 154 0.12 74
YD.T1413.EHZ. 2018-08-20T02:02:07.90 0.3 undecidable manual S 103 0.1286 143 0.03 74
IV.MELA.HHZ. 2018-08-20T02:02:06.18 0.1 negative manual P 130 0.2716 119 -0.15 95
IV.CIGN.HHZ. 2018-08-20T02:02:05.44 0.3 undecidable manual P 170 0.2311 124 -0.3 70
YD.T1413.EHZ. 2018-08-20T02:02:04.43 0.1 positive manual P 103 0.1286 143 -0.03 100
IV.FRES.HHZ. 2018-08-20T02:02:04.96 0.1 undecidable manual P 304 0.1628 136 0.12 98
YD.T1411.EHZ. 2018-08-20T02:02:04.17 0.1 positive manual P 41 0.0863 154 0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRES.HHE. ML:1.2 9.62E-5 0.1 AML other m 2018-08-20T02:02:05.72
IV.FRES.HHN. ML:1 5.745E-5 0.32 AML other m 2018-08-20T02:02:05.76
YD.T1411.EHN. ML:1.9 0.000538 0.14 AML other m 2018-08-20T02:02:07.41
YD.T1411.EHE. ML:1.9 0.000532 0.22 AML other m 2018-08-20T02:02:07.45
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