Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 12-07-2021 and time 23:41:12 (Italy) in region 3 km NE Collelongo (AQ)

A magnitude ML 2.0 earthquake occured in region: 3 km NE Collelongo (AQ), on

  • 12-07-2021 21:41:12 (UTC)
  • 12-07-2021 23:41:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9120, 13.6100 at 8 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
Collelongo AQ 3 1233 1233
Villavallelonga AQ 5 919 2152
Ortucchio AQ 6 1860 4012
Lecce nei Marsi AQ 7 1702 5714
Trasacco AQ 8 6246 11960
Gioia dei Marsi AQ 9 1989 13949
San Benedetto dei Marsi AQ 11 3909 17858
San Vincenzo Valle Roveto AQ 11 2347 20205
Civita d'Antino AQ 12 979 21184
Bisegna AQ 12 223 21407
Balsorano AQ 13 3569 24976
Luco dei Marsi AQ 13 6079 31055
Pescina AQ 14 4133 35188
Morino AQ 14 1448 36636
Ortona dei Marsi AQ 14 542 37178
Civitella Roveto AQ 15 3268 40446
Canistro AQ 17 995 41441
Collarmele AQ 17 894 42335
Cerchio AQ 17 1635 43970
Pescosolido FR 18 1555 45525
Anversa degli Abruzzi AQ 19 341 45866
Pescasseroli AQ 19 2203 48069
Aielli AQ 19 1475 49544
Villalago AQ 19 568 50112
Capistrello AQ 19 5252 55364
Cocullo AQ 19 230 55594
Celano AQ 20 11017 66611
Campoli Appennino FR 20 1725 68336

Municipalities with at least 50000 inhabitants

An earthquake occurred to
52 Km SE of L'Aquila (69753 inhabitants)
67 Km SW of Chieti (51815 inhabitants)
67 Km E of Tivoli (56533 inhabitants)
73 Km E of Velletri (53303 inhabitants)
74 Km E of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Latina (125985 inhabitants)
79 Km SW of Pescara (121014 inhabitants)
81 Km SW of Montesilvano (53738 inhabitants)
84 Km S of Teramo (54892 inhabitants)
87 Km E of Aprilia (73446 inhabitants)
93 Km E of Roma (2864731 inhabitants)
96 Km E of Pomezia (62966 inhabitants)
96 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 2.0 2021-07-12
21:41:12		 41.9117 13.6098 8 2021-12-29
11:12:21		 Bollettino Sismico Italiano INGV 94409551
Reviewed
Rev100 		ML 2.0 2021-07-12
21:41:12		 41.9183 13.6172 8 2021-07-12
21:52:02		 Sala Sismica INGV-Roma 92683851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-12 21:41:12 ± 0.04
Latitude 41.9117 ± 0.0027
Longitude 13.6098 ± 0.0036
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94409551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 250
Semi-minor axis of confidence ellipse (meter) 155
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.04317
Epicentral distance of station farthest from the epicenter (degree) 0.68079
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 92683851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-12 21:52:02

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 94409551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-20 09:55:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIGS.HJZ. 2021-07-12T21:41:32.28 0.6 undecidable manual S 357 60.0954 50 0.26 44
IV.MIDA.HHZ. 2021-07-12T21:41:32.55 0.6 undecidable manual S 119 61.0944 50 0.26 44
IV.CERT.HHZ. 2021-07-12T21:41:30.02 0.3 undecidable manual S 275 52.0035 50 0.18 68
IV.VCEL.EHZ. 2021-07-12T21:41:30.94 0.6 undecidable manual S 19 56.7987 50 -0.2 45
IV.CERA.HHZ. 2021-07-12T21:41:29.42 0.3 undecidable manual S 136 48.5181 50 0.5 64
IV.MCI.EHZ. 2021-07-12T21:41:29.47 0.6 undecidable manual S 160 49.617 50 0.26 45
IV.GIUL.HHZ. 2021-07-12T21:41:29.29 0.3 undecidable manual S 217 49.0176 50 0.24 67
IV.RNI2.HHZ. 2021-07-12T21:41:29.20 0.6 undecidable manual S 117 50.5161 50 -0.24 45
IV.LPEL.HHZ. 2021-07-12T21:41:28.87 0.3 undecidable manual S 72 49.617 50 -0.34 66
IV.FAGN.HHZ. 2021-07-12T21:41:26.22 0.3 undecidable manual S 357 39.3273 50 -0.25 68
IV.T0110.HHZ. 2021-07-12T21:41:26.16 0.3 undecidable manual S 21 37.8288 50 0.09 71
IV.VAGA.HHZ. 2021-07-12T21:41:26.40 0.1 undecidable manual P 137 75.5688 50 0.11 88
IT.SULA.HNN. 2021-07-12T21:41:24.23 0.3 undecidable manual S 55 31.0467 105 0.26 69
IT.SULP.HGN. 2021-07-12T21:41:24.73 0.3 undecidable manual S 54 32.4453 104 0.27 69
IT.SULC.HNZ. 2021-07-12T21:41:23.80 0.6 undecidable manual S 55 30.1476 105 0.12 48
IV.GUAR.HHZ. 2021-07-12T21:41:23.25 0.3 undecidable manual S 242 27.8499 106 0.36 68
IV.VCEL.EHZ. 2021-07-12T21:41:23.58 0.3 undecidable manual P 19 56.7987 50 0.17 67
IV.GIGS.HJZ. 2021-07-12T21:41:23.70 0.3 undecidable manual P 357 60.0954 50 -0.21 66
IV.MIDA.HHZ. 2021-07-12T21:41:23.74 0.1 undecidable manual P 119 61.0944 50 -0.32 86
IV.LRP.EHZ. 2021-07-12T21:41:23.23 0.3 undecidable manual S 184 29.4483 105 -0.2 70
IV.FIAM.HHZ. 2021-07-12T21:41:23.21 0.6 undecidable manual P 314 56.5989 50 -0.16 45
IV.RNI2.HHZ. 2021-07-12T21:41:22.87 0.3 undecidable manual P 117 50.5161 50 0.44 64
IV.LPEL.HHZ. 2021-07-12T21:41:22.00 0.3 undecidable manual P 72 49.617 50 -0.29 66
IV.INTR.HHZ. 2021-07-12T21:41:22.50 0.3 undecidable manual S 65 26.751 107 -0.03 73
IV.MCI.EHZ. 2021-07-12T21:41:22.70 0.3 undecidable manual P 160 49.617 50 0.41 65
IV.CERT.HHZ. 2021-07-12T21:41:22.46 0.3 undecidable manual P 275 52.0035 50 -0.2 67
IV.GIUL.HHZ. 2021-07-12T21:41:22.07 0.1 undecidable manual P 217 49.0176 50 -0.13 92
MN.AQU.HNN. 2021-07-12T21:41:22.18 0.6 undecidable manual P 341 51.9036 50 -0.46 43
IT.OPI.HGZ. 2021-07-12T21:41:21.63 0.3 undecidable manual S 129 23.6541 109 0.13 72
IV.LIK.EHN.01 2021-07-12T21:41:21.86 0.6 undecidable manual P 185 45.9207 50 0.14 46
IV.CERA.HHZ. 2021-07-12T21:41:21.81 0.1 negative manual P 136 48.5181 50 -0.31 88
IV.POFI.HHZ. 2021-07-12T21:41:20.99 0.3 undecidable manual S 159 23.1546 109 -0.36 69
IV.T0110.HHZ. 2021-07-12T21:41:20.21 0.1 undecidable manual P 21 37.8288 50 -0.26 91
IV.PTQR.HHZ. 2021-07-12T21:41:20.69 0.3 undecidable manual S 305 21.1677 111 -0.01 74
IV.FAGN.HHZ. 2021-07-12T21:41:20.33 0.3 undecidable manual P 357 39.3273 50 -0.38 66
IT.SULP.HGN. 2021-07-12T21:41:19.89 0.3 undecidable manual P 54 32.4453 104 0.34 68
IT.SULC.HNZ. 2021-07-12T21:41:19.27 0.3 undecidable manual P 55 30.1476 105 0.17 70
IT.SULA.HNN. 2021-07-12T21:41:19.70 0.3 undecidable manual P 55 31.0467 105 0.44 67
IV.GUAR.HHZ. 2021-07-12T21:41:19.05 0.3 undecidable manual P 242 27.8499 106 0.4 67
IV.LRP.EHZ. 2021-07-12T21:41:18.86 0.1 undecidable manual P 184 29.4483 105 -0.1 96
IV.INTR.HHZ. 2021-07-12T21:41:18.38 0.1 undecidable manual P 65 26.751 107 -0.05 97
IV.PTQR.HHZ. 2021-07-12T21:41:17.50 0.1 undecidable manual P 305 21.1677 111 0.12 97
IV.POFI.HHZ. 2021-07-12T21:41:17.71 0.1 negative manual P 159 23.1546 109 -0.05 98
IT.OPI.HGZ. 2021-07-12T21:41:17.72 0.3 undecidable manual P 129 23.6541 109 -0.12 72
IV.VVLD.HHZ. 2021-07-12T21:41:15.64 0.3 undecidable manual S 167 4.7952 149 -0.46 69
IV.VVLD.HHZ. 2021-07-12T21:41:14.64 0.1 negative manual P 167 4.7952 149 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHE. ML:1.8 0.00044950000000000003 1.72 AML other m 2021-07-12T21:41:22.89
IV.INTR.HHN. ML:2.4 0.001405 0.34 AML other m 2021-07-12T21:41:23.78
IV.INTR.HNN. ML:2.4 0.0013599999999999999 0.34 AML other m 2021-07-12T21:41:23.78
IV.INTR.HNE. ML:2.2 0.0008144412000000001 0.384 AML other m 2021-07-12T21:41:23.73
IV.INTR.HHE. ML:2.2 0.0008429450999999999 0.384 AML other m 2021-07-12T21:41:23.73
IV.PTQR.HHN. ML:1.8 0.00044217659999999995 0.2048 AML other m 2021-07-12T21:41:23.21
IV.LRP.EHE. ML:1.9 0.0004057503 0.2048 AML other m 2021-07-12T21:41:25.55
IV.LRP.EHN. ML:1.3 0.00010583622 0.2304 AML other m 2021-07-12T21:41:24.33
IV.GUAR.HHE. ML:1.8 0.00038739535 0.32 AML other m 2021-07-12T21:41:25.84
IV.T0110.HHE. ML:2.2 0.000601 0.64 AML other m 2021-07-12T21:41:27.68
IV.T0110.HHN. ML:2.2 0.0006284249500000001 0.3584 AML other m 2021-07-12T21:41:28.94
IV.GIUL.HHN. ML:1.9 0.00021250000000000002 1.76 AML other m 2021-07-12T21:41:30.04
IV.GIUL.HHE. ML:2.0 0.00028000000000000003 0.5 AML other m 2021-07-12T21:41:30.02
IV.CERA.HHN. ML:2.3 0.0005164999999999999 1.6 AML other m 2021-07-12T21:41:30.88
IV.FAGN.HHE. ML:2.2 0.000507 0.32 AML other m 2021-07-12T21:41:30.79
IV.CERT.HHN. ML:1.8 0.00014305 0.24 AML other m 2021-07-12T21:41:32.50
IV.MCI.EHE. ML:2.2 0.0004030627 0.2176 AML other m 2021-07-12T21:41:32.08
IV.MCI.EHN. ML:2.0 0.00027949999999999996 0.18 AML other m 2021-07-12T21:41:32.49
IV.RNI2.HHN. ML:2.2 0.000395 0.56 AML other m 2021-07-12T21:41:33.32
IV.CERA.HHE. ML:2.2 0.000423 0.44 AML other m 2021-07-12T21:41:33.24
IV.MIDA.HHN. ML:2.2 0.00035999999999999997 1.6 AML other m 2021-07-12T21:41:33.97
IV.MIDA.HHE. ML:2.4 0.0005380000000000001 1.5 AML other m 2021-07-12T21:41:34.86
IV.MIDA.HNN. ML:2.4 0.0005515 1.5 AML other m 2021-07-12T21:41:34.12
IV.MIDA.HNE. ML:2.2 0.00031750789999999995 0.3968 AML other m 2021-07-12T21:41:33.98
IV.CERT.HHE. ML:1.6 0.00010021607 0.5632 AML other m 2021-07-12T21:41:35.18
IV.LPEL.HHE. ML:1.9 0.0002 0.24 AML other m 2021-07-12T21:41:35.35
IV.RNI2.HHE. ML:1.9 0.0002215 0.6 AML other m 2021-07-12T21:41:36.19
IV.VCEL.EHN. ML:2.0 0.0002115 0.24 AML other m 2021-07-12T21:41:36.22
IV.VCEL.EHE. ML:2.1 0.00027249999999999996 0.54 AML other m 2021-07-12T21:41:36.93
IV.LPEL.HHN. ML:1.8 0.0001663326 0.2048 AML other m 2021-07-12T21:41:30.57
IV.VAGA.HHN. ML:1.8 0.00009870000000000001 1.66 AML other m 2021-07-12T21:41:44.03
IV.VAGA.HHE. ML:1.4 0.00004115 0.9 AML other m 2021-07-12T21:41:45.86
IV.VVLD.HNE. ML:0.0 0.0039661745 0.2688 AML other m 2021-07-12T21:41:16.70
IV.VVLD.HHE. ML:0.0 0.0042321105000000005 0.2688 AML other m 2021-07-12T21:41:16.70
IV.VVLD.HHN. ML:0.0 0.0046585735 0.2432 AML other m 2021-07-12T21:41:16.47
IV.VVLD.HNN. ML:0.0 0.004353457000000001 0.2432 AML other m 2021-07-12T21:41:16.47
IV.CERA.HNN. ML:2.2 0.0004904497499999999 0.3968 AML other m 2021-07-12T21:41:30.89
IV.CERA.HNE. ML:2.1 0.00031805205000000005 0.6144 AML other m 2021-07-12T21:41:34.58
IV.LPEL.HNE. ML:1.9 0.0002135009 0.256 AML other m 2021-07-12T21:41:35.35
IV.LPEL.HNN. ML:1.8 0.00016137175500000002 0.1792 AML other m 2021-07-12T21:41:33.29
IV.CERT.HNE. ML:1.9 0.00021339550000000002 0.2688 AML other m 2021-07-12T21:41:31.83
IV.CERT.HNN. ML:1.9 0.00018674685000000002 0.3072 AML other m 2021-07-12T21:41:32.34
IV.VAGA.HNE. ML:1.6 0.000057256700000000004 0.3968 AML other m 2021-07-12T21:41:41.79
IV.VAGA.HNN. ML:1.8 0.00009946839499999998 0.576 AML other m 2021-07-12T21:41:41.80
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