Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 21-07-2023 and time 17:10:01 (UTC) in region 3 km E Valle Castellana (TE)

A magnitude ML 2.3 earthquake occured in region: 3 km E Valle Castellana (TE), on

  • 21-07-2023 17:10:01 (UTC)
  • 21-07-2023 19:10:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7340, 13.5380 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.

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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
Valle Castellana TE 3 977 977
Rocca Santa Maria TE 5 537 1514
Acquasanta Terme AP 11 2916 4430
Civitella del Tronto TE 11 5116 9546
Campli TE 12 7209 16755
Cortino TE 13 656 17411
Folignano AP 13 9241 26652
Torricella Sicura TE 13 2641 29293
Ascoli Piceno AP 14 49407 78700
Roccafluvione AP 15 2010 80710
Teramo TE 16 54892 135602
Maltignano AP 17 2401 138003
Venarotta AP 17 2066 140069
Sant'Egidio alla Vibrata TE 18 9811 149880
Montorio al Vomano TE 18 8218 158098
Palmiano AP 20 196 158294

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of Teramo (54892 inhabitants)
44 Km N of L'Aquila (69753 inhabitants)
56 Km W of Montesilvano (53738 inhabitants)
63 Km W of Pescara (121014 inhabitants)
67 Km NW of Chieti (51815 inhabitants)
72 Km E of Foligno (57155 inhabitants)
75 Km E of Terni (111501 inhabitants)
98 Km S of Ancona (100861 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 2.3 2023-07-21
17:10:01		 42.7335 13.5378 15 2024-09-10
16:44:29		 Bollettino Sismico Italiano INGV 130430501
Reviewed
Rev100 		ML 2.5 2023-07-21
17:10:01		 42.7417 13.5447 14 2023-07-21
17:19:04		 Sala Sismica INGV-Roma 119456731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-21 17:10:01 ± 0.11
Latitude 42.7335 ± 0.0036
Longitude 13.5378 ± 0.0086
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 130430501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 618
Semi-minor axis of confidence ellipse (meter) 334
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.10612
Epicentral distance of station farthest from the epicenter (degree) 0.68888
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 119456731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-21 17:19:04

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 130430501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-08-05 12:29:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2023-07-21T17:10:26.29 0.6 undecidable manual S 339 76.4679 94 1.49 25
IV.ARRO.EHZ. 2023-07-21T17:10:22.66 0.6 undecidable manual S 255 65.2902 95 0.83 36
IV.CESI.HHZ. 2023-07-21T17:10:20.76 0.6 undecidable manual S 301 59.5959 95 0.44 42
IV.CSP1.EHZ. 2023-07-21T17:10:17.50 0.3 undecidable manual S 326 48.1185 97 0.24 68
IV.FDMO.HHZ. 2023-07-21T17:10:17.70 0.6 undecidable manual S 313 49.7169 97 0.01 47
IV.LNSS.HHZ. 2023-07-21T17:10:16.53 0.6 undecidable manual S 251 43.1235 98 0.59 41
IV.TRTR.HHZ. 2023-07-21T17:10:14.74 0.6 undecidable manual S 75 31.746 103 1.79 23
IV.NRCA.HNZ. 2023-07-21T17:10:14.20 0.6 undecidable manual S 288 36.2415 100 0.07 48
IV.CING.HHZ. 2023-07-21T17:10:14.86 0.3 undecidable manual P 339 76.4679 94 -0.26 64
IV.RM33.EHZ. 2023-07-21T17:10:14.56 0.6 undecidable manual S 227 36.3414 100 0.41 44
IV.ARRO.EHZ. 2023-07-21T17:10:13.29 0.3 undecidable manual P 255 65.2902 95 -0.12 67
IV.CESI.HHZ. 2023-07-21T17:10:12.28 0.3 undecidable manual P 301 59.5959 95 -0.26 66
IV.MF5.EHZ. 2023-07-21T17:10:12.48 0.6 undecidable manual S 347 28.9488 104 0.26 47
IV.OFFI.HHE. 2023-07-21T17:10:12.48 0.6 undecidable manual S 28 25.3524 108 1.17 33
IV.GIGS.HHZ. 2023-07-21T17:10:12.55 0.6 undecidable manual S 175 31.2465 103 -0.27 46
IV.CAMP.HHZ. 2023-07-21T17:10:11.20 0.6 undecidable manual S 206 24.3534 109 0.15 48
IV.MMO1.EHZ. 2023-07-21T17:10:11.15 0.3 undecidable manual S 317 25.1526 108 -0.11 72
IV.LNSS.HHZ. 2023-07-21T17:10:10.02 0.3 undecidable manual P 251 43.1235 98 0.01 71
IV.CSP1.EHZ. 2023-07-21T17:10:10.34 0.1 undecidable manual P 326 48.1185 97 -0.43 87
IV.SMA1.EHZ. 2023-07-21T17:10:10.31 0.6 undecidable manual S 235 20.0688 115 0.32 47
IV.FDMO.HHZ. 2023-07-21T17:10:10.63 0.1 undecidable manual P 313 49.7169 97 -0.39 87
IV.RM33.EHZ. 2023-07-21T17:10:08.93 0.1 undecidable manual P 227 36.3414 100 -0.04 96
IV.MTRA.EHZ. 2023-07-21T17:10:08.21 0.3 undecidable manual S 283 11.7771 134 0.06 75
IV.TERO.HNZ. 2023-07-21T17:10:08.63 0.6 undecidable manual S 156 13.3755 129 0.15 49
IV.TRTR.HHZ. 2023-07-21T17:10:08.62 0.1 undecidable manual P 75 31.746 103 0.34 91
IV.NRCA.HNZ. 2023-07-21T17:10:08.72 0.1 undecidable manual P 288 36.2415 100 -0.24 92
IV.OFFI.HHE. 2023-07-21T17:10:07.43 0.1 undecidable manual P 28 25.3524 108 0.1 97
IV.MMO1.EHZ. 2023-07-21T17:10:07.03 0.1 undecidable manual P 317 25.1526 108 -0.27 93
IV.GIGS.HHZ. 2023-07-21T17:10:07.83 0.1 positive manual P 175 31.2465 103 -0.38 90
IV.CAMP.HHZ. 2023-07-21T17:10:07.14 0.1 positive manual P 206 24.3534 109 -0.04 98
IV.MF5.EHZ. 2023-07-21T17:10:07.75 0.1 undecidable manual P 347 28.9488 104 -0.11 96
IV.ASCOL.EHE. 2023-07-21T17:10:07.91 0.3 undecidable manual S 18 13.6752 128 -0.63 64
IV.SMA1.EHZ. 2023-07-21T17:10:06.60 0.1 positive manual P 235 20.0688 115 0.03 99
IV.ASCOL.EHE. 2023-07-21T17:10:05.31 0.1 undecidable manual P 18 13.6752 128 -0.42 92
IV.MTRA.EHZ. 2023-07-21T17:10:05.46 0.1 undecidable manual P 283 11.7771 134 -0.05 100
IV.TERO.HNZ. 2023-07-21T17:10:05.67 0.1 undecidable manual P 156 13.3755 129 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:2.2 0.0012853970000000002 0.2048 AML other m 2023-07-21T17:10:08.41
IV.MTRA.EHN. ML:2.2 0.0012812354999999999 0.2176 AML other m 2023-07-21T17:10:08.42
IV.MTRA.HNE. ML:2.4 0.002238718 0.1152 AML other m 2023-07-21T17:10:08.28
IV.MTRA.EHE. ML:2.4 0.002262322 0.0896 AML other m 2023-07-21T17:10:08.29
IV.TERO.HNN. ML:3.0 0.0086913215 0.064 AML other m 2023-07-21T17:10:08.77
IV.TERO.HHN. ML:-0.2 0.0000044399875 0.2944 AML other m 2023-07-21T17:10:08.00
IV.TERO.HNE. ML:2.6 0.0035800000000000003 0.16 AML other m 2023-07-21T17:10:08.89
IV.TERO.HHE. ML:2.9 0.0061717610000000004 0.192 AML other m 2023-07-21T17:10:08.83
IV.SMA1.EHN. ML:2.2 0.0009780992 0.1152 AML other m 2023-07-21T17:10:10.37
IV.MMO1.EHN. ML:2.5 0.0017121475 0.0896 AML other m 2023-07-21T17:10:11.21
IV.MMO1.EHE. ML:2.4 0.0015049185 0.0896 AML other m 2023-07-21T17:10:11.23
IV.SMA1.EHE. ML:2.0 0.00067542735 0.128 AML other m 2023-07-21T17:10:11.44
IV.CAMP.HHE. ML:1.7 0.00027338755 0.1152 AML other m 2023-07-21T17:10:11.58
IV.CAMP.HHN. ML:1.8 0.00032118395 0.6016 AML other m 2023-07-21T17:10:12.39
IV.GIGS.HHE. ML:2.0 0.00044652164999999997 0.0768 AML other m 2023-07-21T17:10:12.77
IV.MF5.EHN. ML:2.0 0.00045447634999999995 0.32 AML other m 2023-07-21T17:10:12.80
IV.GIGS.HHN. ML:1.5 0.00013371740000000002 0.1024 AML other m 2023-07-21T17:10:13.10
IV.MMO1.HNE. ML:3.2 0.009115146 1.088 AML other m 2023-07-21T17:10:13.16
IV.NRCA.HHE. ML:2.4 0.0009715242500000001 0.1408 AML other m 2023-07-21T17:10:14.51
IV.NRCA.HNE. ML:2.4 0.0009062951 0.1152 AML other m 2023-07-21T17:10:14.52
IV.NRCA.HHN. ML:2.5 0.001201737 0.1024 AML other m 2023-07-21T17:10:14.68
IV.TRTR.HHN. ML:2.5 0.0014778530000000001 0.1408 AML other m 2023-07-21T17:10:14.84
IV.RM33.HNE. ML:2.4 0.0010045 0.12 AML other m 2023-07-21T17:10:15.42
IV.RM33.EHE. ML:2.4 0.0009915 0.12 AML other m 2023-07-21T17:10:15.42
IV.LNSS.HHN. ML:2.5 0.0010519070500000002 0.3456 AML other m 2023-07-21T17:10:16.84
IV.LNSS.HNN. ML:2.5 0.0009831569 0.3328 AML other m 2023-07-21T17:10:16.86
IV.RM33.EHN. ML:2.2 0.0005735937 0.2688 AML other m 2023-07-21T17:10:17.70
IV.RM33.HNN. ML:2.2 0.0005798050500000001 0.256 AML other m 2023-07-21T17:10:17.70
IV.LNSS.HHE. ML:2.3 0.00061184975 0.2048 AML other m 2023-07-21T17:10:17.68
IV.LNSS.HNE. ML:2.3 0.000577443 0.192 AML other m 2023-07-21T17:10:17.68
IV.CSP1.EHN. ML:2.7 0.001448025 0.3712 AML other m 2023-07-21T17:10:17.81
IV.CSP1.EHE. ML:2.7 0.0012383123 0.3072 AML other m 2023-07-21T17:10:17.84
IV.FDMO.HHN. ML:2.3 0.00054244285 0.2944 AML other m 2023-07-21T17:10:18.10
IV.FDMO.HHE. ML:2.1 0.0003219667 0.2176 AML other m 2023-07-21T17:10:18.52
IV.CESI.HHN. ML:2.3 0.000406234 0.1664 AML other m 2023-07-21T17:10:20.92
IV.CESI.HNN. ML:2.3 0.00041952045 0.2432 AML other m 2023-07-21T17:10:21.05
IV.CESI.HHE. ML:2.1 0.00026876045000000004 0.1536 AML other m 2023-07-21T17:10:20.90
IV.CESI.HNE. ML:2.1 0.000251367065 0.1408 AML other m 2023-07-21T17:10:20.91
IV.ARRO.EHE. ML:1.9 0.00012989394999999998 0.1664 AML other m 2023-07-21T17:10:23.24
IV.ARRO.EHN. ML:2.1 0.00021610679999999998 0.1792 AML other m 2023-07-21T17:10:23.77
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