Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 12-07-2021 and time 23:47:09 (UTC) in region 4 km NE Collelongo (AQ)

A magnitude ML 1.9 earthquake occured in region: 4 km NE Collelongo (AQ), on

  • 12-07-2021 23:47:09 (UTC)
  • 13-07-2021 01:47:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.9150, 13.6080 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 4 1233 1233
Villavallelonga AQ 5 919 2152
Ortucchio AQ 6 1860 4012
Lecce nei Marsi AQ 7 1702 5714
Trasacco AQ 7 6246 11960
Gioia dei Marsi AQ 8 1989 13949
San Benedetto dei Marsi AQ 10 3909 17858
San Vincenzo Valle Roveto AQ 11 2347 20205
Civita d'Antino AQ 12 979 21184
Bisegna AQ 13 223 21407
Luco dei Marsi AQ 13 6079 27486
Balsorano AQ 13 3569 31055
Pescina AQ 13 4133 35188
Morino AQ 14 1448 36636
Ortona dei Marsi AQ 14 542 37178
Civitella Roveto AQ 15 3268 40446
Collarmele AQ 16 894 41340
Canistro AQ 16 995 42335
Cerchio AQ 17 1635 43970
Aielli AQ 19 1475 45445
Anversa degli Abruzzi AQ 19 341 45786
Pescosolido FR 19 1555 47341
Capistrello AQ 19 5252 52593
Villalago AQ 19 568 53161
Cocullo AQ 19 230 53391
Pescasseroli AQ 19 2203 55594
Celano AQ 20 11017 66611
Avezzano AQ 20 42515 109126

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)
73 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)
83 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 1.9 2021-07-12
23:47:09		 41.9153 13.6075 8 2021-12-29
11:12:21		 Bollettino Sismico Italiano INGV 94409991
Reviewed
Rev100 		ML 2.0 2021-07-12
23:47:09		 41.9162 13.6067 7 2021-07-12
23:54:45		 Sala Sismica INGV-Roma 92687551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-12 23:47:09 ± 0.04
Latitude 41.9153 ± 0.0027
Longitude 13.6075 ± 0.0024
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 94409991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 264
Semi-minor axis of confidence ellipse (meter) 108
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 333
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 44
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.78151
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 42
Type of magnitude ML
Reference to an origin 92687551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-12 23:54:45

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 94409991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-01 20:36:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RDP.HHZ. 2021-07-12T23:47:32.64 0.6 undecidable manual S 257 76.1682 50 0.17 44
IV.LATB.EHZ. 2021-07-12T23:47:31.38 0.3 undecidable manual S 229 70.9734 50 0.28 65
IV.MIDA.HHZ. 2021-07-12T23:47:28.90 0.3 undecidable manual S 119 61.494 50 0.33 65
IV.CERT.HHZ. 2021-07-12T23:47:26.21 0.3 undecidable manual S 274 51.8037 50 0.23 68
IV.LPEL.HHZ. 2021-07-12T23:47:25.19 0.3 undecidable manual S 73 49.7169 50 -0.22 68
IV.RNI2.HHZ. 2021-07-12T23:47:25.70 0.6 undecidable manual S 117 50.8158 50 -0.02 47
IV.CERA.HHZ. 2021-07-12T23:47:25.51 0.6 undecidable manual S 136 48.9177 50 0.29 45
IV.MCI.EHZ. 2021-07-12T23:47:25.90 0.6 undecidable manual S 160 50.0166 50 0.38 44
IV.GIUL.HHZ. 2021-07-12T23:47:25.58 0.3 undecidable manual S 217 49.2174 50 0.29 68
IV.LIK.EHN.01 2021-07-12T23:47:24.53 0.3 undecidable manual S 185 46.3203 50 0.02 72
IV.SGG.HHZ. 2021-07-12T23:47:24.37 0.6 undecidable manual P 132 86.7465 50 0.15 43
IV.RDP.HHZ. 2021-07-12T23:47:22.52 0.6 undecidable manual P 257 76.1682 50 -0.05 45
IV.FAGN.HHZ. 2021-07-12T23:47:22.73 0.6 undecidable manual S 357 38.9277 50 0.18 47
IV.LATB.EHZ. 2021-07-12T23:47:21.36 0.3 undecidable manual P 229 70.9734 50 -0.43 63
IV.T0110.HHZ. 2021-07-12T23:47:21.93 0.6 undecidable manual S 22 37.5291 50 -0.24 46
IT.SULA.HNN. 2021-07-12T23:47:20.44 0.3 undecidable manual S 55 30.9468 105 0.28 70
IV.MIDA.HHZ. 2021-07-12T23:47:20.00 0.3 undecidable manual P 119 61.494 50 -0.32 66
IT.SULP.HGN. 2021-07-12T23:47:20.99 0.3 undecidable manual S 54 32.4453 104 0.34 69
IT.SULC.HNZ. 2021-07-12T23:47:20.32 0.6 undecidable manual S 56 30.0477 105 0.45 45
IV.LRP.EHZ. 2021-07-12T23:47:19.92 0.6 undecidable manual S 183 29.8479 105 0.14 48
IV.GUAR.HHZ. 2021-07-12T23:47:19.53 0.3 undecidable manual S 241 27.8499 106 0.41 68
IV.FIAM.HHZ. 2021-07-12T23:47:19.37 0.3 undecidable manual P 314 56.1993 50 -0.14 69
IV.INTR.HHZ. 2021-07-12T23:47:18.80 0.6 undecidable manual S 66 26.751 107 0.04 49
IV.CERT.HHZ. 2021-07-12T23:47:18.56 0.3 undecidable manual P 274 51.8037 50 -0.26 68
IV.LPEL.HHZ. 2021-07-12T23:47:18.20 0.3 undecidable manual P 73 49.7169 50 -0.3 67
IV.RNI2.HHZ. 2021-07-12T23:47:18.94 0.3 undecidable manual P 117 50.8158 50 0.26 68
IV.CERA.HHZ. 2021-07-12T23:47:18.17 0.3 undecidable manual P 136 48.9177 50 -0.22 69
IV.MCI.EHZ. 2021-07-12T23:47:18.88 0.3 undecidable manual P 160 50.0166 50 0.32 67
MN.AQU.HNN. 2021-07-12T23:47:18.25 0.3 undecidable manual P 341 51.4152 50 -0.52 64
IV.GIUL.HHZ. 2021-07-12T23:47:18.32 0.3 undecidable manual P 217 49.2174 50 -0.11 70
IT.OPI.HGZ. 2021-07-12T23:47:17.92 0.3 undecidable manual S 130 23.9538 109 0.07 74
IV.LIK.EHN.01 2021-07-12T23:47:17.77 0.3 undecidable manual P 185 46.3203 50 -0.2 69
IV.POFI.HHZ. 2021-07-12T23:47:17.44 0.6 undecidable manual S 158 23.5542 109 -0.28 47
IV.T0110.HHZ. 2021-07-12T23:47:16.55 0.1 undecidable manual P 22 37.5291 50 -0.08 96
IV.PTQR.HHZ. 2021-07-12T23:47:16.83 0.3 undecidable manual S 305 20.7681 111 0.03 75
IV.FAGN.HHZ. 2021-07-12T23:47:16.47 0.3 undecidable manual P 357 38.9277 50 -0.38 68
IT.SULP.HGN. 2021-07-12T23:47:15.84 0.6 undecidable manual P 54 32.4453 104 0.09 48
IT.SULC.HNZ. 2021-07-12T23:47:15.73 0.6 undecidable manual P 56 30.0477 105 0.43 45
IV.LRP.EHZ. 2021-07-12T23:47:15.07 0.1 undecidable manual P 183 29.8479 105 -0.17 95
IV.GUAR.HHZ. 2021-07-12T23:47:15.18 0.6 undecidable manual P 241 27.8499 106 0.31 47
IT.SULA.HNN. 2021-07-12T23:47:15.70 0.6 undecidable manual P 55 30.9468 105 0.24 47
IV.INTR.HHZ. 2021-07-12T23:47:14.59 0.1 undecidable manual P 66 26.751 107 -0.06 98
IV.POFI.HHZ. 2021-07-12T23:47:13.86 0.1 negative manual P 158 23.5542 109 -0.2 96
IV.PTQR.HHZ. 2021-07-12T23:47:13.72 0.1 undecidable manual P 305 20.7681 111 0.19 97
IT.OPI.HGZ. 2021-07-12T23:47:13.74 0.6 undecidable manual P 130 23.9538 109 -0.39 46
IV.VVLD.HNZ. 2021-07-12T23:47:12.03 0.6 undecidable manual S 166 5.1948 147 -0.39 48
IV.VVLD.HNZ. 2021-07-12T23:47:10.84 0.1 negative manual P 166 5.1948 147 -0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHN. ML:1.8 0.000494 0.18 AML other m 2021-07-12T23:47:19.41
IV.PTQR.HHE. ML:1.8 0.00044599999999999994 0.36 AML other m 2021-07-12T23:47:19.53
IV.POFI.HHE. ML:1.6 0.00023838065 0.4224 AML other m 2021-07-12T23:47:19.62
IV.POFI.HNE. ML:1.6 0.000256007 0.3968 AML other m 2021-07-12T23:47:19.62
IV.INTR.HHN. ML:2.4 0.0012656359999999999 0.3584 AML other m 2021-07-12T23:47:19.79
IV.INTR.HNN. ML:2.3 0.0011766575000000002 0.3584 AML other m 2021-07-12T23:47:19.80
IV.INTR.HHE. ML:2.2 0.00090848405 0.2816 AML other m 2021-07-12T23:47:21.20
IV.INTR.HNE. ML:2.2 0.00087378675 0.2688 AML other m 2021-07-12T23:47:21.20
IV.LRP.EHN. ML:1.3 0.00010635554999999999 0.1536 AML other m 2021-07-12T23:47:21.66
IV.LRP.EHE. ML:1.8 0.00031345835 0.2432 AML other m 2021-07-12T23:47:21.70
IV.POFI.HNN. ML:1.7 0.00032481074999999996 0.2816 AML other m 2021-07-12T23:47:21.88
IV.POFI.HHN. ML:1.6 0.00028149999999999996 1.3 AML other m 2021-07-12T23:47:23.98
IV.T0110.HHN. ML:2.2 0.000604 1.42 AML other m 2021-07-12T23:47:24.14
IV.T0110.HHE. ML:2.2 0.0005600000000000001 1.7 AML other m 2021-07-12T23:47:24.95
IV.GIUL.HHE. ML:2.0 0.0002485 0.48 AML other m 2021-07-12T23:47:26.18
IV.CERA.HNE. ML:2.0 0.00029738845000000004 0.4352 AML other m 2021-07-12T23:47:26.50
IV.LPEL.HHN. ML:1.9 0.00020041694999999997 0.1792 AML other m 2021-07-12T23:47:26.78
IV.CERA.HNN. ML:2.1 0.0003665 0.4 AML other m 2021-07-12T23:47:27.28
IV.CERA.HHN. ML:2.2 0.000381 0.4 AML other m 2021-07-12T23:47:27.28
IV.FAGN.HHE. ML:2.1 0.000448 0.38 AML other m 2021-07-12T23:47:27.19
IV.LPEL.HHE. ML:1.8 0.00017376930000000002 0.1792 AML other m 2021-07-12T23:47:27.34
IV.LPEL.HNN. ML:1.9 0.0001951131 0.2688 AML other m 2021-07-12T23:47:27.50
IV.MCI.EHE. ML:2.1 0.00036508715000000005 0.3456 AML other m 2021-07-12T23:47:28.26
IV.CERT.HHN. ML:1.6 0.000111168725 0.256 AML other m 2021-07-12T23:47:28.68
IV.GIUL.HHN. ML:1.9 0.00020781345000000002 0.3584 AML other m 2021-07-12T23:47:29.07
IV.MCI.EHN. ML:2.0 0.00028849999999999997 0.2 AML other m 2021-07-12T23:47:29.27
IV.RNI2.HHN. ML:2.1 0.00030100000000000005 0.54 AML other m 2021-07-12T23:47:29.77
IV.MIDA.HHN. ML:2.1 0.000257 0.34 AML other m 2021-07-12T23:47:29.79
IV.CERA.HHE. ML:2.1 0.00035 0.44 AML other m 2021-07-12T23:47:29.42
IV.MIDA.HNE. ML:2.0 0.000226 0.34 AML other m 2021-07-12T23:47:29.79
IV.RNI2.HHE. ML:1.8 0.00014553844999999998 0.3968 AML other m 2021-07-12T23:47:30.14
IV.MIDA.HNN. ML:2.3 0.00038950000000000003 0.44 AML other m 2021-07-12T23:47:30.04
IV.MIDA.HHE. ML:2.3 0.00039850000000000004 0.44 AML other m 2021-07-12T23:47:30.04
IV.CERT.HHE. ML:1.6 0.000088861995 0.5504 AML other m 2021-07-12T23:47:31.35
IV.LATB.EHE. ML:1.7 0.00007357208 0.3968 AML other m 2021-07-12T23:47:31.84
IV.LATB.EHN. ML:1.4 0.000040002365000000006 0.3584 AML other m 2021-07-12T23:47:31.68
IV.CERT.HNE. ML:1.9 0.00022215800000000002 0.5632 AML other m 2021-07-12T23:47:33.80
IV.FIAM.HHE. ML:1.3 0.000045600000000000004 1.44 AML other m 2021-07-12T23:47:34.08
IV.SGG.HHE. ML:1.6 0.00004655 0.64 AML other m 2021-07-12T23:47:38.73
IV.SGG.HHN. ML:1.5 0.000038150000000000006 0.44 AML other m 2021-07-12T23:47:41.56
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