Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-12-2017 and time 16:06:33 (Italy) in region 4 km N Roccasicura (IS)

A magnitude ML 1.8 earthquake occured in region: 4 km N Roccasicura (IS), on

  • 22-12-2017 15:06:33 (UTC)
  • 22-12-2017 16:06:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7350, 14.2390 at 18 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
Roccasicura IS 4 550 550
Vastogirardi IS 5 704 1254
Carovilli IS 5 1359 2613
Forlì del Sannio IS 6 675 3288
San Pietro Avellana IS 8 503 3791
Rionero Sannitico IS 9 1118 4909
Acquaviva d'Isernia IS 10 425 5334
Miranda IS 10 1047 6381
Pescolanciano IS 10 855 7236
Capracotta IS 11 903 8139
Castel di Sangro AQ 12 6538 14677
Pietrabbondante IS 13 759 15436
Sessano del Molise IS 13 727 16163
Agnone IS 13 5139 21302
Castel del Giudice IS 13 346 21648
Chiauci IS 14 233 21881
Castelverrino IS 14 115 21996
Ateleta AQ 14 1181 23177
Pesche IS 14 1661 24838
Cerro al Volturno IS 14 1281 26119
Montenero Val Cocchiara IS 14 538 26657
Poggio Sannita IS 15 702 27359
Civitanova del Sannio IS 16 945 28304
Isernia IS 16 21842 50146
Fornelli IS 16 1909 52055
Scontrone AQ 17 574 52629
Sant'Angelo del Pesco IS 17 364 52993
Pescopennataro IS 17 285 53278
Alfedena AQ 17 864 54142
Castel San Vincenzo IS 17 516 54658
Carpinone IS 17 1157 55815
Rocchetta a Volturno IS 18 1113 56928
Pettoranello del Molise IS 18 460 57388
Roccaraso AQ 18 1627 59015
Belmonte del Sannio IS 18 768 59783
Pizzone IS 18 329 60112
Bagnoli del Trigno IS 19 735 60847
Colli a Volturno IS 19 1349 62196
Gamberale CH 19 320 62516
Macchia d'Isernia IS 20 1035 63551
Scapoli IS 20 680 64231

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km S of Chieti (51815 inhabitants)
74 Km N of Caserta (76326 inhabitants)
81 Km NW of Benevento (60091 inhabitants)
81 Km S of Pescara (121014 inhabitants)
85 Km N of Aversa (53047 inhabitants)
87 Km S of Montesilvano (53738 inhabitants)
88 Km N of Acerra (59573 inhabitants)
90 Km N of Giugliano in Campania (122974 inhabitants)
91 Km N of Afragola (65057 inhabitants)
92 Km N of Casoria (77642 inhabitants)
93 Km N of Marano di Napoli (59874 inhabitants)
95 Km W of San Severo (53905 inhabitants)
98 Km SE of L'Aquila (69753 inhabitants)
99 Km N of Pozzuoli (81661 inhabitants)
100 Km N of Napoli (974074 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 1.8 2017-12-22
15:06:33		 41.7352 14.2392 18 2018-09-04
09:10:39		 Bollettino Sismico Italiano INGV 53040621
Reviewed
Rev100 		ML 2.0 2017-12-22
15:06:33		 41.7347 14.2453 16 2017-12-22
15:16:28		 Sala Sismica INGV-Roma 52741011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-22 15:06:33 ± 0.06
Latitude 41.7352 ± 0.0045
Longitude 14.2392 ± 0.0036
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 53040621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 383
Semi-minor axis of confidence ellipse (meter) 315
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 27
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.07195
Epicentral distance of station farthest from the epicenter (degree) 0.49463
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 23
Type of magnitude ML
Reference to an origin 53040621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-01-05 22:21:29

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 52741011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-22 15:16:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LRP.EHN. 2017-12-22T15:06:51.02 1.0 undecidable manual S 260 54.9006 99 0.41 22
IV.VVLD.HHZ. 2017-12-22T15:06:50.44 1.0 undecidable manual S 287 53.1024 100 0.32 22
IV.INTR.HHZ. 2017-12-22T15:06:47.32 1.0 undecidable manual S 318 41.3253 103 0.29 23
IV.POFI.HNE. 2017-12-22T15:06:47.62 1.0 undecidable manual S 268 43.7229 102 -0.04 24
IV.LPEL.HHZ. 2017-12-22T15:06:45.24 1.0 undecidable manual S 352 34.8429 106 -0.14 23
IV.VAGA.HHZ. 2017-12-22T15:06:45.10 1.0 undecidable manual S 181 35.4423 106 -0.43 23
IV.TRIV.HHZ. 2017-12-22T15:06:43.48 0.6 undecidable manual S 82 25.9518 114 0.33 46
IV.LRP.EHN. 2017-12-22T15:06:43.37 0.1 undecidable manual P 260 54.9006 99 0.06 94
IV.VVLD.HHZ. 2017-12-22T15:06:42.84 0.1 undecidable manual P 287 53.1024 100 -0.19 91
IV.CERA.HHZ. 2017-12-22T15:06:42.65 1.0 undecidable manual S 230 23.8539 117 0.02 25
IV.POFI.HNE. 2017-12-22T15:06:41.64 0.1 undecidable manual P 268 43.7229 102 0.03 96
IV.INTR.HHZ. 2017-12-22T15:06:41.24 0.1 undecidable manual P 318 41.3253 103 -0.01 96
IV.SGG.HNN. 2017-12-22T15:06:41.24 0.1 undecidable manual P 163 40.3263 104 0.13 94
IV.LPEL.HHZ. 2017-12-22T15:06:40.05 0.1 undecidable manual P 352 34.8429 106 -0.25 93
IV.VAGA.HHZ. 2017-12-22T15:06:40.37 0.1 undecidable manual P 181 35.4423 106 -0.01 97
IV.MIDA.HHZ. 2017-12-22T15:06:39.53 0.6 undecidable manual S 173 10.3785 144 -0.33 48
IV.RNI2.HHZ. 2017-12-22T15:06:39.78 1.0 undecidable manual S 244 7.9809 152 0.26 25
IV.TRIV.HHZ. 2017-12-22T15:06:38.98 0.1 undecidable manual P 82 25.9518 114 -0.03 100
IV.CERA.HHZ. 2017-12-22T15:06:38.77 0.1 undecidable manual P 230 23.8539 117 0.06 99
IV.RNI2.HHZ. 2017-12-22T15:06:37.12 0.1 positive manual P 244 7.9809 152 0.21 99
IV.MIDA.HHZ. 2017-12-22T15:06:36.99 0.1 positive manual P 173 10.3785 144 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.INTR.HHE. ML:1.7 0.0001463051 0.1152 AML other m 2017-12-22T15:06:47.84
IV.MIDA.HNE. ML:2.1 0.00109271895 0.2176 AML other m 2017-12-22T15:06:40.74
IV.MIDA.HHN. ML:2.0 0.0008872661500000001 0.2944 AML other m 2017-12-22T15:06:40.56
IV.MIDA.HNN. ML:2.0 0.0009275901 0.32 AML other m 2017-12-22T15:06:39.76
IV.MIDA.HHE. ML:2.1 0.00111763045 0.2048 AML other m 2017-12-22T15:06:40.73
IV.RNI2.HNN. ML:2.3 0.0016548245000000002 0.2304 AML other m 2017-12-22T15:06:40.80
IV.RNI2.HNE. ML:2.1 0.001244097 0.1536 AML other m 2017-12-22T15:06:40.13
IV.RNI2.HHN. ML:2.3 0.0017154085 0.2432 AML other m 2017-12-22T15:06:40.79
IV.RNI2.HHE. ML:2.2 0.0012771515 0.1536 AML other m 2017-12-22T15:06:40.20
IV.CERA.HNN. ML:1.4 0.00013984235 0.5376 AML other m 2017-12-22T15:06:46.36
IV.CERA.HNE. ML:1.3 0.00010795865 0.6656 AML other m 2017-12-22T15:06:47.61
IV.CERA.HHE. ML:1.4 0.00012046932999999998 0.6656 AML other m 2017-12-22T15:06:47.61
IV.CERA.HHN. ML:1.4 0.0001401463 0.5376 AML other m 2017-12-22T15:06:46.63
IV.TRIV.HNN. ML:1.5 0.0001642625 0.3584 AML other m 2017-12-22T15:06:46.88
IV.TRIV.HHE. ML:1.6 0.00019003300000000002 0.4352 AML other m 2017-12-22T15:06:47.25
IV.TRIV.HHN. ML:1.5 0.00015764285 0.3584 AML other m 2017-12-22T15:06:46.88
IV.LPEL.HHE. ML:1.9 0.00030914759999999995 0.1536 AML other m 2017-12-22T15:06:47.62
IV.LPEL.HHN. ML:2.0 0.00036412325000000003 0.1792 AML other m 2017-12-22T15:06:46.22
IV.VAGA.HHE. ML:1.4 0.00010220167 0.1664 AML other m 2017-12-22T15:06:49.82
IV.VAGA.HHN. ML:1.6 0.00015968464999999998 0.2816 AML other m 2017-12-22T15:06:47.42
IV.VAGA.HNE. ML:1.4 0.00009428257 0.1792 AML other m 2017-12-22T15:06:49.82
IV.VAGA.HNN. ML:1.6 0.0001551829 0.448 AML other m 2017-12-22T15:06:49.36
IV.INTR.HHN. ML:1.8 0.0001795415 0.1408 AML other m 2017-12-22T15:06:48.14
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