Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 18-12-2019 and time 12:20:43 (UTC) in region 4 km SE Balsorano (AQ)

A magnitude ML 1.1 earthquake occured in region: 4 km SE Balsorano (AQ), on

  • 18-12-2019 12:20:43 (UTC)
  • 18-12-2019 13:20:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7760, 13.5960 at 14 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
Balsorano AQ 4 3569 3569
Pescosolido FR 6 1555 5124
Sora FR 6 26144 31268
Campoli Appennino FR 8 1725 32993
Broccostella FR 9 2741 35734
San Vincenzo Valle Roveto AQ 9 2347 38081
Villavallelonga AQ 11 919 39000
Isola del Liri FR 11 11715 50715
Castelliri FR 11 3454 54169
Collelongo AQ 12 1233 55402
Posta Fibreno FR 12 1139 56541
Fontechiari FR 14 1303 57844
Arpino FR 14 7262 65106
Vicalvi FR 14 783 65889
Morino AQ 15 1448 67337
Alvito FR 16 2713 70050
Civita d'Antino AQ 16 979 71029
Monte San Giovanni Campano FR 17 12929 83958
Pescasseroli AQ 17 2203 86161
Veroli FR 18 20560 106721
Boville Ernica FR 18 8737 115458
Fontana Liri FR 19 2953 118411
Casalvieri FR 19 2698 121109
Collepardo FR 19 968 122077
Lecce nei Marsi AQ 19 1702 123779
Opi AQ 20 420 124199
Santopadre FR 20 1357 125556
San Donato Val di Comino FR 20 2107 127663

Municipalities with at least 50000 inhabitants

An earthquake occurred to
66 Km S of L'Aquila (69753 inhabitants)
67 Km NE of Latina (125985 inhabitants)
69 Km E of Velletri (53303 inhabitants)
69 Km E of Tivoli (56533 inhabitants)
76 Km E of Guidonia Montecelio (88673 inhabitants)
80 Km SW of Chieti (51815 inhabitants)
81 Km E of Aprilia (73446 inhabitants)
88 Km E of Anzio (54211 inhabitants)
92 Km E of Pomezia (62966 inhabitants)
92 Km SW of Pescara (121014 inhabitants)
93 Km E of Roma (2864731 inhabitants)
94 Km SW of Montesilvano (53738 inhabitants)
99 Km S of Teramo (54892 inhabitants)
99 Km NW 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 1.1 2019-12-18
12:20:43		 41.7765 13.5963 15 2020-02-28
16:42:15		 Bollettino Sismico Italiano INGV 74791551
Reviewed
Rev100 		ML 1.1 2019-12-18
12:20:43		 41.7768 13.5983 14 2019-12-18
12:31:14		 Sala Sismica INGV-Roma 74763081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-18 12:20:43 ± 0.05
Latitude 41.7765 ± 0.0036
Longitude 13.5963 ± 0.0036
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 74791551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 429
Semi-minor axis of confidence ellipse (meter) 140
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) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51351
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 74791551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-19 13:26:55

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 74763081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-18 12:31:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NDIM.HNZ. 2019-12-18T12:22:32.61 3.0 undecidable manual Sg 17.67 0
GU.BLANC.HHZ. 2019-12-18T12:22:31.23 3.0 undecidable manual Pg 21.940001 0
IV.PLMA.HHZ. 2019-12-18T12:22:28.57 3.0 undecidable manual Sg 17.35 0
IV.FERC.HNZ. 2019-12-18T12:22:22.83 3.0 undecidable manual Sn -3.5 0
IV.MILZ.HHZ. 2019-12-18T12:22:21.36 3.0 undecidable manual Sn -1.16 0
SI.BOSI.HHZ. 2019-12-18T12:22:03.20 3.0 positive manual Pg 10.96 0
IV.HAGA.HHZ. 2019-12-18T12:22:01.33 3.0 positive manual Pg 10.86 0
OX.CIMO.HHZ. 2019-12-18T12:21:59.99 3.0 positive manual Pg 12.65 0
GU.ENR.HHZ. 2019-12-18T12:21:57.93 3.0 undecidable manual Pn 4.76 0
IV.EUCT.HNZ. 2019-12-18T12:21:55.54 3.0 positive manual Pn 7.92 0
IV.ZONE.HHZ. 2019-12-18T12:21:53.85 3.0 undecidable manual Pn 5.93 0
IV.MFNL.HHZ. 2019-12-18T12:21:46.79 3.0 negative manual Pn 6.05 0
IV.ALJA.HHZ. 2019-12-18T12:21:43.47 3.0 undecidable manual Pn 2.14 0
IV.CAR1.HHZ. 2019-12-18T12:21:34.64 3.0 undecidable manual Pn 2.95 0
IV.FIR.HHZ. 2019-12-18T12:21:28.02 3.0 negative manual Pg 8.89 0
IV.FOSV.EHZ. 2019-12-18T12:21:26.03 3.0 undecidable manual Sn 0.16 0
IV.MMO1.EHZ. 2019-12-18T12:21:14.48 3.0 undecidable manual S -0.31 0
IV.LPEL.HHE. 2019-12-18T12:21:01.67 1.0 undecidable manual S 58 56.9985 94 0.22 23
IV.CERT.HHE. 2019-12-18T12:21:00.56 0.3 undecidable manual S 291 54.3012 95 -0.17 70
IV.CERA.HNN. 2019-12-18T12:20:57.07 0.3 undecidable manual S 119 40.1265 97 0.08 73
IV.INTR.HHZ. 2019-12-18T12:20:56.16 0.3 undecidable manual S 44 36.4413 98 0.16 72
IV.GIUL.HHZ. 2019-12-18T12:20:56.40 1.0 undecidable manual S 230 37.2294 98 0.18 24
IV.MCI.EHE. 2019-12-18T12:20:56.13 0.6 undecidable manual S 150 36.4413 98 0.14 48
IV.PTQR.HHZ. 2019-12-18T12:20:54.83 0.3 undecidable manual S 329 31.6461 100 0.08 74
IV.LPEL.HHE. 2019-12-18T12:20:53.82 1.0 undecidable manual P 58 56.9985 94 -0.15 23
IV.CERT.HHE. 2019-12-18T12:20:53.38 0.1 undecidable manual P 291 54.3012 95 -0.17 93
IV.GUAR.HHZ. 2019-12-18T12:20:52.71 0.3 undecidable manual S 275 23.5542 107 0.07 75
IT.OPI.HGE. 2019-12-18T12:20:51.55 0.3 undecidable manual S 90 19.3695 113 -0.02 77
IV.CERA.HNN. 2019-12-18T12:20:51.39 0.1 undecidable manual P 119 40.1265 97 0 99
IV.GIUL.HHZ. 2019-12-18T12:20:51.09 0.1 undecidable manual P 230 37.2294 98 0.14 96
IV.MCI.EHE. 2019-12-18T12:20:50.49 0.3 undecidable manual P 150 36.4413 98 -0.33 70
IV.PTQR.HHZ. 2019-12-18T12:20:50.22 0.1 undecidable manual P 329 31.6461 100 0.12 98
IV.LRP.EHZ. 2019-12-18T12:20:50.40 0.3 undecidable manual S 183 14.3745 124 -0.01 77
IV.INTR.HHZ. 2019-12-18T12:20:50.87 0.1 positive manual P 44 36.4413 98 0.05 98
IV.VVLD.HHZ. 2019-12-18T12:20:49.52 0.3 undecidable manual S 12 10.5783 135 -0.1 76
IV.POFI.HHZ. 2019-12-18T12:20:49.56 0.3 undecidable manual S 124 11.5773 132 -0.26 74
IV.GUAR.HHZ. 2019-12-18T12:20:48.64 0.3 undecidable manual P 275 23.5542 107 -0.24 72
IV.LRP.EHZ. 2019-12-18T12:20:47.77 0.1 undecidable manual P 183 14.3745 124 0.18 99
IT.OPI.HGE. 2019-12-18T12:20:47.89 0.1 undecidable manual P 90 19.3695 113 -0.38 95
IV.VVLD.HHZ. 2019-12-18T12:20:47.33 0.1 negative manual P 12 10.5783 135 0.19 100
IV.POFI.HHZ. 2019-12-18T12:20:47.49 0.1 undecidable manual P 124 11.5773 132 0.23 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHE. ML:1.2 0.00013700000000000002 0.46 AML other m 2019-12-18T12:20:50.45
IV.VVLD.HHN. ML:1.1 0.000126 0.94 AML other m 2019-12-18T12:20:50.80
IV.POFI.HHN. ML:0.8 0.00005989999999999999 0.7 AML other m 2019-12-18T12:20:50.69
IV.LRP.EHN. ML:1.0 0.00007575 0.16 AML other m 2019-12-18T12:20:50.78
IV.POFI.HHE. ML:1.0 0.00009045 1.32 AML other m 2019-12-18T12:20:50.29
IV.LRP.EHE. ML:1.2 0.0001465 1.6 AML other m 2019-12-18T12:20:51.81
IV.PTQR.HHE. ML:1.2 0.0000746 0.26 AML other m 2019-12-18T12:20:55.37
IV.PTQR.HHN. ML:1.1 0.00005025 1.38 AML other m 2019-12-18T12:20:56.13
IV.INTR.HHE. ML:1.1 0.00005027926 1.7632 AML other m 2019-12-18T12:20:57.02
IV.INTR.HHN. ML:1.3 0.00006874224500000001 0.1792 AML other m 2019-12-18T12:20:57.12
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