Earthquake with magnitude of ML 1.7 on date 22-01-2021 and time 17:43:32 (Italy) in region 4 km N Villavallelonga (AQ)

A magnitude ML 1.7 earthquake occured in region: 4 km N Villavallelonga (AQ), on

  • 22-01-2021 16:43:32 (UTC)
  • 22-01-2021 17:43:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9040, 13.6320 at 15 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
Villavallelonga AQ 4 919 919
Collelongo AQ 4 1233 2152
Lecce nei Marsi AQ 6 1702 3854
Ortucchio AQ 6 1860 5714
Gioia dei Marsi AQ 8 1989 7703
Trasacco AQ 10 6246 13949
Bisegna AQ 11 223 14172
San Benedetto dei Marsi AQ 12 3909 18081
San Vincenzo Valle Roveto AQ 12 2347 20428
Balsorano AQ 12 3569 23997
Civita d'Antino AQ 13 979 24976
Ortona dei Marsi AQ 13 542 25518
Pescina AQ 14 4133 29651
Luco dei Marsi AQ 15 6079 35730
Morino AQ 15 1448 37178
Pescasseroli AQ 17 2203 39381
Civitella Roveto AQ 17 3268 42649
Pescosolido FR 17 1555 44204
Villalago AQ 17 568 44772
Anversa degli Abruzzi AQ 18 341 45113
Collarmele AQ 18 894 46007
Cerchio AQ 18 1635 47642
Canistro AQ 19 995 48637
Cocullo AQ 19 230 48867
Campoli Appennino FR 19 1725 50592
Aielli AQ 20 1475 52067

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 Km SE of L'Aquila (69753 inhabitants)
67 Km SW of Chieti (51815 inhabitants)
69 Km E of Tivoli (56533 inhabitants)
75 Km E of Velletri (53303 inhabitants)
76 Km E of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Latina (125985 inhabitants)
79 Km SW of Pescara (121014 inhabitants)
80 Km SW of Montesilvano (53738 inhabitants)
84 Km S of Teramo (54892 inhabitants)
89 Km E of Aprilia (73446 inhabitants)
95 Km E of Roma (2864731 inhabitants)
97 Km E of Pomezia (62966 inhabitants)
97 Km NE of Anzio (54211 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 1.7 2021-01-22
16:43:32
41.9045 13.6317 15 2021-07-12
16:54:57
Bollettino Sismico Italiano INGV 86812861
Reviewed
Rev100
ML 1.7 2021-01-22
16:43:32
41.9013 13.6328 14 2021-01-22
16:53:56
Sala Sismica INGV-Roma 86462681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 16:43:32 ± 0.06
Latitude 41.9045 ± 0.0036
Longitude 13.6317 ± 0.0048
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 86812861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 89
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 106
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 86462681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 16:53:56

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 86812861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-03 17:35:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHZ. 2021-01-22T16:43:48.08 0.6 undecidable manual S 219 49.5171 96 0.22 44
IV.CERA.HHE. 2021-01-22T16:43:47.55 0.6 undecidable manual S 137 46.7199 96 0.43 43
IV.LPEL.HHZ. 2021-01-22T16:43:47.28 0.6 undecidable manual S 71 48.1185 96 -0.22 44
IV.T0110.HHZ. 2021-01-22T16:43:44.72 0.6 undecidable manual S 18 37.9287 99 -0.09 46
IT.SULP.HGE. 2021-01-22T16:43:43.20 0.6 undecidable manual S 51 31.5462 101 0.08 47
IT.SULA.HNZ. 2021-01-22T16:43:43.00 0.6 undecidable manual S 51 30.0477 102 0.27 46
IV.LRP.EHZ. 2021-01-22T16:43:42.38 0.6 undecidable manual S 187 28.749 103 -0.02 48
IV.GUAR.HHE. 2021-01-22T16:43:42.30 0.6 undecidable manual S 245 29.0487 103 -0.17 47
IV.INTR.HHZ. 2021-01-22T16:43:41.60 0.6 undecidable manual S 62 25.4523 106 0.06 48
IV.GIUL.HHZ. 2021-01-22T16:43:40.91 0.3 undecidable manual P 219 49.5171 96 -0.31 65
IV.POFI.HNE. 2021-01-22T16:43:40.42 0.6 undecidable manual S 162 21.7671 110 -0.18 47
IV.CERA.HHE. 2021-01-22T16:43:40.48 0.3 undecidable manual P 137 46.7199 96 -0.31 65
IV.PTQR.HHZ. 2021-01-22T16:43:40.91 0.3 undecidable manual S 304 23.0547 108 -0.02 72
IV.LPEL.HHZ. 2021-01-22T16:43:40.69 0.3 undecidable manual P 71 48.1185 96 -0.32 65
IV.FAGN.HHZ. 2021-01-22T16:43:39.85 0.6 undecidable manual P 354 40.2264 98 0.05 47
IV.T0110.HHZ. 2021-01-22T16:43:39.27 0.3 undecidable manual P 18 37.9287 99 -0.18 68
IV.GUAR.HHE. 2021-01-22T16:43:38.62 0.3 undecidable manual P 245 29.0487 103 0.51 64
IT.SULA.HNZ. 2021-01-22T16:43:38.83 0.6 undecidable manual P 51 30.0477 102 0.57 42
IT.SULP.HGE. 2021-01-22T16:43:38.63 0.3 undecidable manual P 51 31.5462 101 0.15 70
IV.LRP.EHZ. 2021-01-22T16:43:38.03 0.3 undecidable manual P 187 28.749 103 -0.03 72
IV.POFI.HNE. 2021-01-22T16:43:37.01 0.1 positive manual P 162 21.7671 110 -0.02 97
IV.PTQR.HHZ. 2021-01-22T16:43:37.09 0.1 negative manual P 304 23.0547 108 -0.13 94
IV.VVLD.HHZ. 2021-01-22T16:43:37.13 0.1 undecidable manual S 190 3.8961 162 -0.02 100
IV.INTR.HHZ. 2021-01-22T16:43:37.49 0.1 negative manual P 62 25.4523 106 -0.08 95
IV.VVLD.HHZ. 2021-01-22T16:43:35.12 0.1 negative manual P 190 3.8961 162 0.09 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HNE. ML:1.8 0.0006540000000000001 0.16 AML other m 2021-01-22T16:43:37.29
IV.VVLD.HHE. ML:1.8 0.0007224999999999999 0.16 AML other m 2021-01-22T16:43:37.29
IV.VVLD.HHN. ML:1.7 0.0006145 0.4 AML other m 2021-01-22T16:43:37.24
IV.VVLD.HNN. ML:1.7 0.0005595 0.38 AML other m 2021-01-22T16:43:37.25
IV.PTQR.HHE. ML:1.2 0.00009699513499999999 1.8208 AML other m 2021-01-22T16:43:41.08
IV.INTR.HHN. ML:1.9 0.0003988235 0.1408 AML other m 2021-01-22T16:43:41.84
IV.INTR.HNN. ML:1.9 0.00038372565 0.128 AML other m 2021-01-22T16:43:41.84
IV.INTR.HHE. ML:1.8 0.00032277499999999997 0.1408 AML other m 2021-01-22T16:43:42.16
IV.INTR.HNE. ML:1.8 0.00030409405 0.3584 AML other m 2021-01-22T16:43:42.57
IV.PTQR.HHN. ML:1.2 0.00009240000000000001 0.46 AML other m 2021-01-22T16:43:42.58
IV.T0110.HHE. ML:1.5 0.00012038915 0.1792 AML other m 2021-01-22T16:43:46.03
IV.T0110.HHN. ML:1.6 0.00012491315 0.384 AML other m 2021-01-22T16:43:47.64
IV.LPEL.HHE. ML:1.7 0.000118 0.12 AML other m 2021-01-22T16:43:48.81
IV.LPEL.HHN. ML:1.6 0.000100860005 0.1408 AML other m 2021-01-22T16:43:48.81
IV.FAGN.HHE. ML:1.8 0.00021650000000000003 0.5 AML other m 2021-01-22T16:43:49.66
IV.FAGN.HHN. ML:1.7 0.000162 0.36 AML other m 2021-01-22T16:43:51.35
IV.LPEL.HNE. ML:1.8 0.00015411864 0.3712 AML other m 2021-01-22T16:43:50.64
IV.LPEL.HNN. ML:1.7 0.00013475426499999998 0.6784 AML other m 2021-01-22T16:43:46.48
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