Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-11-2019 and time 14:37:21 (Italy) in region 4 km SE Balsorano (AQ)

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

  • 20-11-2019 13:37:21 (UTC)
  • 20-11-2019 14:37:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7770, 13.5890 at 12 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 7 26144 31268
San Vincenzo Valle Roveto AQ 8 2347 33615
Campoli Appennino FR 9 1725 35340
Broccostella FR 9 2741 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 13 1139 56541
Fontechiari FR 14 1303 57844
Arpino FR 14 7262 65106
Vicalvi FR 15 783 65889
Morino AQ 15 1448 67337
Civita d'Antino AQ 16 979 68316
Alvito FR 16 2713 71029
Monte San Giovanni Campano FR 16 12929 83958
Veroli FR 17 20560 104518
Pescasseroli AQ 17 2203 106721
Boville Ernica FR 18 8737 115458
Collepardo FR 18 968 116426
Fontana Liri FR 19 2953 119379
Casalvieri FR 19 2698 122077
Lecce nei Marsi AQ 19 1702 123779
Santopadre FR 20 1357 125136

Municipalities with at least 50000 inhabitants

An earthquake occurred to
66 Km S of L'Aquila (69753 inhabitants)
66 Km NE of Latina (125985 inhabitants)
68 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)
91 Km E of Pomezia (62966 inhabitants)
92 Km SW of Pescara (121014 inhabitants)
92 Km E of Roma (2864731 inhabitants)
94 Km SW of Montesilvano (53738 inhabitants)
99 Km S of Teramo (54892 inhabitants)
100 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 2019-11-20
13:37:21		 41.7768 13.5892 12 2020-02-28
16:42:08		 Bollettino Sismico Italiano INGV 73939111
Reviewed
Rev100 		ML 1.1 2019-11-20
13:37:21		 41.7738 13.5905 11 2019-11-20
13:45:05		 Sala Sismica INGV-Roma 73934821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-11-20 13:37:21 ± 0.04
Latitude 41.7768 ± 0.0027
Longitude 13.5892 ± 0.0024
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73939111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 309
Semi-minor axis of confidence ellipse (meter) 117
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 11
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
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) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.09623
Epicentral distance of station farthest from the epicenter (degree) 0.48473
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:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 73939111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-11-20 21:33:14

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 73934821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-11-20 13:45:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CERT.HHE. 2019-11-20T13:37:37.59 0.3 undecidable manual S 291 53.7018 92 -0.26 68
IV.T0110.HHZ. 2019-11-20T13:37:37.69 0.3 undecidable manual S 17 52.503 92 0.16 68
IV.RCAV.EHZ. 2019-11-20T13:37:37.74 0.3 undecidable manual S 279 53.8017 92 -0.14 69
IV.CERA.HNN. 2019-11-20T13:37:34.29 0.6 undecidable manual S 119 40.7259 92 -0.1 46
IV.GIUL.HHZ. 2019-11-20T13:37:33.50 0.3 undecidable manual S 229 36.8298 93 0.15 69
IV.PTQR.HHZ. 2019-11-20T13:37:31.90 0.3 undecidable manual S 330 31.3464 94 0.01 72
IV.RCAV.EHZ. 2019-11-20T13:37:30.53 1.0 undecidable manual P 279 53.8017 92 -0.24 22
IV.CERT.HHE. 2019-11-20T13:37:30.43 0.1 positive manual P 291 53.7018 92 -0.32 88
IV.T0110.HHZ. 2019-11-20T13:37:30.60 0.1 undecidable manual P 17 52.503 92 0.03 93
IV.GUAR.HHZ. 2019-11-20T13:37:29.75 0.3 undecidable manual S 275 22.9548 97 0.09 72
IV.GIUL.HHZ. 2019-11-20T13:37:28.21 0.1 positive manual P 229 36.8298 93 0.06 95
IV.CERA.HNN. 2019-11-20T13:37:28.59 0.1 undecidable manual P 119 40.7259 92 -0.16 92
IT.OPI.HGZ. 2019-11-20T13:37:28.81 0.3 undecidable manual S 90 19.9689 99 -0.05 72
IV.LRP.EHZ. 2019-11-20T13:37:27.45 0.3 undecidable manual S 181 14.3745 111 0.02 75
IV.PTQR.HHZ. 2019-11-20T13:37:27.39 0.1 undecidable manual P 330 31.3464 94 0.08 95
IV.VVLD.HHZ. 2019-11-20T13:37:26.53 0.3 undecidable manual S 15 10.6782 125 -0.02 75
IV.POFI.HHZ. 2019-11-20T13:37:26.61 0.3 undecidable manual S 123 12.0768 119 -0.27 70
IV.GUAR.HHZ. 2019-11-20T13:37:26.08 0.1 undecidable manual P 275 22.9548 97 0.05 97
IT.OPI.HGZ. 2019-11-20T13:37:25.67 0.1 undecidable manual P 90 19.9689 99 0.11 98
IV.LRP.EHZ. 2019-11-20T13:37:24.84 0.1 undecidable manual P 181 14.3745 111 0.11 98
IV.VVLD.HHZ. 2019-11-20T13:37:24.42 0.1 negative manual P 15 10.6782 125 0.19 97
IV.POFI.HHZ. 2019-11-20T13:37:24.49 0.1 undecidable manual P 123 12.0768 119 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HNN. ML:1.1 0.0001395278 0.5696 AML other m 2019-11-20T13:37:26.65
IV.VVLD.HHN. ML:1.1 0.00014423765 0.1408 AML other m 2019-11-20T13:37:26.80
IV.POFI.HHE. ML:0.7 0.00005292979 0.1216 AML other m 2019-11-20T13:37:27.11
IV.POFI.HNE. ML:0.9 0.00008276265000000001 0.3456 AML other m 2019-11-20T13:37:27.39
IV.VVLD.HHE. ML:1.1 0.00013430855 0.1792 AML other m 2019-11-20T13:37:27.33
IV.VVLD.HNE. ML:1.1 0.00014976716499999997 0.1664 AML other m 2019-11-20T13:37:27.33
IV.POFI.HHN. ML:0.7 0.000050151879999999995 0.2176 AML other m 2019-11-20T13:37:27.94
IV.LRP.EHN. ML:1.4 0.0002055888 0.0768 AML other m 2019-11-20T13:37:27.86
IV.LRP.EHE. ML:1.3 0.0001960073 0.1024 AML other m 2019-11-20T13:37:28.04
IV.POFI.HNN. ML:1.3 0.00020973086999999998 1.3312 AML other m 2019-11-20T13:37:28.13
IV.GUAR.HHN. ML:1.3 0.00012360925 0.2624 AML other m 2019-11-20T13:37:29.00
IV.PTQR.HHE. ML:1.1 0.00006186512 0.2752 AML other m 2019-11-20T13:37:32.31
IV.PTQR.HHN. ML:1.0 0.00004329177 0.16 AML other m 2019-11-20T13:37:33.41
IV.GIUL.HHN. ML:1.1 0.0000441946 0.1792 AML other m 2019-11-20T13:37:33.79
IV.GIUL.HHE. ML:0.9 0.000028003939999999997 0.16 AML other m 2019-11-20T13:37:33.91
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