Earthquake with magnitude of ML 1.6 on date 20-07-2021 and time 19:39:26 (Italy) in region 2 km W Campotosto (AQ)

A magnitude ML 1.6 earthquake occured in region: 2 km W Campotosto (AQ), on

  • 20-07-2021 17:39:26 (UTC)
  • 20-07-2021 19:39:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.568, 13.345 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Campotosto AQ 2 542 542
Capitignano AQ 6 665 1207
Amatrice RI 8 2657 3864
Montereale AQ 9 2581 6445
Crognaleto TE 11 1297 7742
Barete AQ 14 737 8479
Cortino TE 15 656 9135
Pizzoli AQ 15 4326 13461
Cagnano Amiterno AQ 16 1369 14830
Fano Adriano TE 16 296 15126
Cittareale RI 16 482 15608
Accumoli RI 16 667 16275
Pietracamela TE 18 271 16546
Borbona RI 18 617 17163
Rocca Santa Maria TE 20 537 17700

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km N of L'Aquila (69753 inhabitants)
31 Km W of Teramo (54892 inhabitants)
57 Km E of Terni (111501 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
68 Km SE of Foligno (57155 inhabitants)
72 Km W of Chieti (51815 inhabitants)
72 Km W of Pescara (121014 inhabitants)
81 Km NE of Tivoli (56533 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km SE of Perugia (166134 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 1.6 2021-07-20
17:39:26
42.5675 13.3453 8 2021-12-29
11:12:13
Bollettino Sismico Italiano INGV 93113241
Reviewed
Rev100
ML 1.6 2021-07-20
17:39:26
42.5643 13.3458 8 2021-07-20
17:44:25
Sala Sismica INGV-Roma 92993371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-20 17:39:26 ± 0.07
Latitude 42.5675 ± 0.0036
Longitude 13.3453 ± 0.0049
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 93113241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 360
Semi-minor axis of confidence ellipse (meter) 306
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 236
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.14394
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 93113241
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-23 16:47:23

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 92993371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-20 17:44:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LAV9.HNZ. 2021-07-20T17:40:01.37 3.0 undecidable manual S -0.46 0
IV.MIDA.HHZ. 2021-07-20T17:39:49.12 3.0 positive manual P 1.1439 0.94 0
IV.POFI.HHZ. 2021-07-20T17:39:46.29 3.0 undecidable manual P 0.8921 2.43 0
IV.CSP1.EHZ. 2021-07-20T17:39:46.21 0.6 undecidable manual S 349 0.5342 50 0.41 44
IV.MF5.EHZ. 2021-07-20T17:39:43.18 0.6 undecidable manual S 11 0.4281 50 0.51 43
IV.RMP.HHZ. 2021-07-20T17:39:43.48 3.0 positive manual P 0.8912 -0.37 0
IV.SRES.HHZ. 2021-07-20T17:39:43.13 3.0 positive manual P 0.6997 2.56 0
IV.VCEL.EHZ. 2021-07-20T17:39:42.43 0.6 undecidable manual S 115 0.4038 50 0.49 44
IV.MC2.EHZ. 2021-07-20T17:39:40.72 0.6 undecidable manual S 342 0.3624 50 0.01 49
IV.NRCA.HHZ. 2021-07-20T17:39:38.66 0.6 undecidable manual S 328 0.3157 102 -0.49 45
IV.CSP1.EHZ. 2021-07-20T17:39:37.49 0.6 undecidable manual P 349 0.5342 50 -0.25 45
IV.T0110.HHZ. 2021-07-20T17:39:36.49 0.6 positive manual P 137 0.4641 50 -0.05 48
IV.LNSS.HHZ. 2021-07-20T17:39:36.05 0.6 undecidable manual S 279 0.2275 107 0.2 49
IV.MF5.EHZ. 2021-07-20T17:39:36.03 0.1 undecidable manual P 11 0.4281 50 0.1 95
IV.VCEL.EHZ. 2021-07-20T17:39:35.89 0.6 positive manual P 115 0.4038 50 0.38 45
IV.MC2.EHZ. 2021-07-20T17:39:34.38 0.1 undecidable manual P 342 0.3624 50 -0.42 90
IV.MTRA.EHZ. 2021-07-20T17:39:34.36 0.3 undecidable manual S 11 0.1925 109 -0.23 73
IV.GIGS.HHZ. 2021-07-20T17:39:34.46 0.6 undecidable manual S 124 0.2032 108 -0.5 46
IV.GAVE.EHZ. 2021-07-20T17:39:34.03 0.6 undecidable manual P 291 0.3543 50 -0.63 42
IV.TERO.HHZ. 2021-07-20T17:39:34.68 0.6 undecidable manual S 74 0.1979 109 -0.1 50
IV.NRCA.HHZ. 2021-07-20T17:39:33.50 0.6 undecidable manual P 328 0.3157 102 -0.4 46
IV.GIGS.HHZ. 2021-07-20T17:39:31.31 0.6 undecidable manual P 124 0.2032 108 -0.17 49
IV.RM33.EHZ. 2021-07-20T17:39:31.82 0.6 undecidable manual S 239 0.1124 121 0.04 51
IV.LNSS.HHZ. 2021-07-20T17:39:31.86 0.1 undecidable manual P 279 0.2275 107 -0.14 98
IV.TERO.HHZ. 2021-07-20T17:39:31.34 0.3 undecidable manual P 74 0.1979 109 -0.04 76
MN.AQU.HHZ. 2021-07-20T17:39:31.78 0.3 undecidable manual P 168 0.2176 107 -0.01 76
IV.MTRA.EHZ. 2021-07-20T17:39:31.14 0.3 undecidable manual P 11 0.1925 109 -0.12 74
IV.SMA1.EHZ. 2021-07-20T17:39:30.56 0.6 undecidable manual S 353 0.0639 137 0.27 49
IV.T1299.HNZ. 2021-07-20T17:39:30.98 0.3 undecidable manual S 325 0.0809 130 0.19 75
IV.SMA1.EHZ. 2021-07-20T17:39:29.05 0.1 negative manual P 353 0.0639 137 0.27 99
IV.T1299.HNZ. 2021-07-20T17:39:29.36 0.1 undecidable manual P 325 0.0809 130 0.29 98
IV.RM33.EHZ. 2021-07-20T17:39:29.80 0.1 positive manual P 239 0.1124 121 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.7 0.0010205 1.3 AML other m 2021-07-20T17:39:30.23
IV.SMA1.EHN. ML:1.8 0.001325 0.3 AML other m 2021-07-20T17:39:30.93
IV.RM33.EHN. ML:1.7 0.000691 1.06 AML other m 2021-07-20T17:39:32.65
IV.RM33.EHE. ML:1.8 0.000708 1.3 AML other m 2021-07-20T17:39:32.70
IV.TERO.HHN. ML:1.8 0.0004825 0.18 AML other m 2021-07-20T17:39:34.87
IV.TERO.HHE. ML:1.6 0.000258 0.28 AML other m 2021-07-20T17:39:34.98
IV.MTRA.EHE. ML:1.5 0.00024 1.58 AML other m 2021-07-20T17:39:35.85
IV.MTRA.EHN. ML:1.4 0.000186 1.38 AML other m 2021-07-20T17:39:35.87
IV.LNSS.HHN. ML:1.4 0.000142 0.66 AML other m 2021-07-20T17:39:36.18
IV.LNSS.HHE. ML:1.4 0.000165 0.46 AML other m 2021-07-20T17:39:36.89
IV.GAVE.EHE. ML:1.2 6.24E-5 0.42 AML other m 2021-07-20T17:39:42.89
IV.GAVE.EHN. ML:1.2 6.06E-5 1.36 AML other m 2021-07-20T17:39:43.04
IV.VCEL.EHE. ML:1.5 0.000107 0.5 AML other m 2021-07-20T17:39:44.45
IV.VCEL.EHN. ML:1.6 0.0001255 0.52 AML other m 2021-07-20T17:39:44.51
IV.T0110.HHN. ML:1.3 5.62E-5 1.62 AML other m 2021-07-20T17:39:45.18
IV.CSP1.EHE. ML:1.4 5.325E-5 0.6 AML other m 2021-07-20T17:39:46.27
IV.T0110.HHE. ML:1.4 6.255E-5 0.58 AML other m 2021-07-20T17:39:48.06
IV.CSP1.EHN. ML:1.4 6.245E-5 1.52 AML other m 2021-07-20T17:39:48.07
IV.MIDA.HHE. ML:1.8 4.36E-5 0.06 AML other m 2021-07-20T17:39:52.05
IV.LAV9.HHE. ML:2.7 0.0004585 0.38 AML other m 2021-07-20T17:40:05.26
IV.LAV9.HHN. ML:2.8 0.0004975 0.12 AML other m 2021-07-20T17:40:23.93
IV.MIDA.HHN. ML:2 5.82E-5 0.06 AML other m 2021-07-20T17:40:29.12
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