Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 11-07-2021 and time 01:06:20 (UTC) in region 2 km E Borgorose (RI)

A magnitude ML 1.1 earthquake occured in region: 2 km E Borgorose (RI), on

  • 11-07-2021 01:06:20 (UTC)
  • 11-07-2021 03:06:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.1910, 13.2530 at 10 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
Borgorose RI 2 4591 4591
Pescorocchiano RI 9 2075 6666
Sante Marie AQ 11 1166 7832
Tornimparte AQ 12 3187 11019
Lucoli AQ 13 1011 12030
Fiamignano RI 13 1413 13443
Tagliacozzo AQ 14 6889 20332
Magliano de' Marsi AQ 14 3690 24022
Massa d'Albe AQ 15 1476 25498
Nespolo RI 16 246 25744
Scurcola Marsicana AQ 16 2824 28568
Marcetelli RI 17 89 28657
Carsoli AQ 17 5396 34053
Collalto Sabino RI 18 442 34495
Collegiove RI 18 213 34708
Petrella Salto RI 19 1197 35905
Pereto AQ 19 682 36587
Varco Sabino RI 20 187 36774

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of L'Aquila (69753 inhabitants)
45 Km NE of Tivoli (56533 inhabitants)
48 Km E of Guidonia Montecelio (88673 inhabitants)
64 Km SW of Teramo (54892 inhabitants)
65 Km SE of Terni (111501 inhabitants)
68 Km NE of Velletri (53303 inhabitants)
72 Km E of Roma (2864731 inhabitants)
77 Km W of Chieti (51815 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
83 Km NE of Aprilia (73446 inhabitants)
85 Km W of Pescara (121014 inhabitants)
85 Km NE of Pomezia (62966 inhabitants)
85 Km NE of Latina (125985 inhabitants)
96 Km E of Fiumicino (78395 inhabitants)
96 Km SE of Foligno (57155 inhabitants)
97 Km NE of Anzio (54211 inhabitants)
98 Km E of Viterbo (67173 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 2021-07-11
01:06:20		 42.1907 13.2528 10 2021-12-29
11:12:11		 Bollettino Sismico Italiano INGV 92781471
Reviewed
Rev100 		ML 1.1 2021-07-11
01:06:20		 42.1793 13.2473 10 2021-07-11
01:12:54		 Sala Sismica INGV-Roma 92594751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-11 01:06:20 ± 0.06
Latitude 42.1907 ± 0.0036
Longitude 13.2528 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 92781471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 352
Semi-minor axis of confidence ellipse (meter) 315
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 150
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 24
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51531
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 92781471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-15 09:52:31

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 92594751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-11 01:12:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CDRU.HHZ. 2021-07-11T01:07:03.14 3.0 negative manual Pg 1.71 0
IV.ICAI.EHZ. 2021-07-11T01:06:52.12 3.0 positive manual P 0.61 0
IV.T0110.HHZ. 2021-07-11T01:06:35.38 0.3 undecidable manual S 84 43.2234 50 0.24 70
IV.CAMP.HHE. 2021-07-11T01:06:34.52 0.6 undecidable manual S 18 40.3263 50 0.14 48
IV.RM33.EHZ. 2021-07-11T01:06:32.87 0.3 undecidable manual S 355 35.4423 50 -0.2 71
IV.CERT.HHZ. 2021-07-11T01:06:32.66 0.3 undecidable manual S 220 34.8429 50 -0.26 70
IV.INTR.HHE. 2021-07-11T01:06:31.18 0.6 undecidable manual P 110 57.1983 50 -0.07 47
IV.FAGN.HHZ. 2021-07-11T01:06:31.54 0.3 undecidable manual S 73 28.4493 50 0.35 70
IV.VVLD.HHZ. 2021-07-11T01:06:30.13 0.1 undecidable manual P 139 46.9197 50 0.47 88
IV.RCAV.EHZ. 2021-07-11T01:06:29.33 0.1 undecidable manual P 214 45.7209 50 -0.15 94
IV.MTCE.HHZ. 2021-07-11T01:06:29.39 0.6 undecidable manual P 246 45.9207 50 -0.12 47
IV.T0110.HHZ. 2021-07-11T01:06:29.23 0.3 undecidable manual P 84 43.2234 50 0.14 71
IV.GUAR.HNN. 2021-07-11T01:06:29.58 0.3 undecidable manual P 174 44.2224 50 0.33 68
IV.LNSS.HNZ. 2021-07-11T01:06:29.84 0.1 undecidable manual P 339 48.9177 50 -0.13 94
IV.CAMP.HHE. 2021-07-11T01:06:28.41 0.1 undecidable manual P 18 40.3263 50 -0.24 93
IV.PTQR.HHZ. 2021-07-11T01:06:28.85 0.3 undecidable manual S 147 22.3554 113 -0.42 69
IV.GIGS.HHN. 2021-07-11T01:06:28.28 0.1 undecidable manual P 42 39.2274 50 -0.19 94
IV.CERT.HHZ. 2021-07-11T01:06:27.81 0.3 undecidable manual P 220 34.8429 50 0 74
IV.RM33.EHZ. 2021-07-11T01:06:27.94 0.3 undecidable manual P 355 35.4423 50 0.05 73
IT.CSO1.HGZ. 2021-07-11T01:06:27.74 0.3 undecidable manual S 234 16.872 120 0.18 74
IV.FIAM.HHZ. 2021-07-11T01:06:26.90 0.3 undecidable manual S 308 14.0748 124 0.15 74
IV.FAGN.HHZ. 2021-07-11T01:06:26.61 0.3 undecidable manual P 73 28.4493 50 -0.2 72
MN.AQU.HNZ. 2021-07-11T01:06:25.49 0.3 undecidable manual P 35 21.9669 114 -0.15 73
IV.PTQR.HHZ. 2021-07-11T01:06:25.48 0.3 undecidable manual P 147 22.3554 113 -0.22 72
IV.FIAM.HHZ. 2021-07-11T01:06:24.45 0.1 undecidable manual P 308 14.0748 124 0.2 98
IT.CSO1.HGZ. 2021-07-11T01:06:24.81 0.1 undecidable manual P 234 16.872 120 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIAM.HHN. ML:1.0 0.0001045 0.68 AML other m 2021-07-11T01:06:29.09
IV.FIAM.HHE. ML:0.8 0.00006075 0.36 AML other m 2021-07-11T01:06:30.56
IV.PTQR.HHE. ML:1.0 0.00005855 1.34 AML other m 2021-07-11T01:06:32.29
IV.CERT.HHN. ML:0.9 0.00003594999999999999 0.42 AML other m 2021-07-11T01:06:33.12
IV.PTQR.HHN. ML:1.0 0.0000722 0.48 AML other m 2021-07-11T01:06:33.62
IV.RM33.EHN. ML:1.0 0.0000446 1.28 AML other m 2021-07-11T01:06:35.23
IV.FAGN.HHN. ML:1.5 0.0001535 0.58 AML other m 2021-07-11T01:06:36.05
IV.T0110.HHN. ML:1.2 0.00005205 0.58 AML other m 2021-07-11T01:06:36.53
IV.FAGN.HHE. ML:1.5 0.000169 1.68 AML other m 2021-07-11T01:06:37.00
IV.CERT.HHE. ML:0.9 0.00002815 0.54 AML other m 2021-07-11T01:06:39.34
IV.RM33.EHE. ML:1.0 0.00004725 1.14 AML other m 2021-07-11T01:06:39.24
IV.T0110.HHE. ML:1.2 0.00005525 0.8 AML other m 2021-07-11T01:06:39.88
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