Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 21-07-2023 and time 19:10:01 (Italy) in region 4 km E Valle Castellana (TE)

A magnitude ML 2.5 earthquake occured in region: 4 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) 42.7420, 13.5450 at 14 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 4 977 977
Rocca Santa Maria TE 6 537 1514
Civitella del Tronto TE 11 5116 6630
Acquasanta Terme AP 11 2916 9546
Folignano AP 12 9241 18787
Campli TE 12 7209 25996
Ascoli Piceno AP 13 49407 75403
Torricella Sicura TE 13 2641 78044
Cortino TE 14 656 78700
Roccafluvione AP 15 2010 80710
Maltignano AP 16 2401 83111
Teramo TE 16 54892 138003
Venarotta AP 16 2066 140069
Sant'Egidio alla Vibrata TE 17 9811 149880
Montorio al Vomano TE 19 8218 158098
Palmiano AP 19 196 158294
Ancarano TE 19 1857 160151
Castel di Lama AP 20 8634 168785

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of Teramo (54892 inhabitants)
45 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)
73 Km E of Foligno (57155 inhabitants)
76 Km E of Terni (111501 inhabitants)
97 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
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 ± 0.09
Latitude 42.7417 ± 0.0036
Longitude 13.5447 ± 0.0061
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119456731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 480
Semi-minor axis of confidence ellipse (meter) 52
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.59535
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 17
Magnitude 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
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 3.0 undecidable manual S 0.04 0
IV.ARRO.EHZ. 2023-07-21T17:10:22.66 0.6 undecidable manual S 254 66.0894 93 0.65 38
IV.CESI.HHZ. 2023-07-21T17:10:20.76 0.6 undecidable manual S 300 59.6958 93 0.45 42
IV.CSP1.EHZ. 2023-07-21T17:10:17.47 1.0 undecidable manual S 325 47.619 95 0.36 22
IV.FDMO.HHZ. 2023-07-21T17:10:17.26 0.6 undecidable manual S 312 49.5171 94 -0.34 45
IV.LNSS.HHZ. 2023-07-21T17:10:16.53 0.6 undecidable manual S 250 43.9227 95 0.42 43
IV.NRCA.HNZ. 2023-07-21T17:10:14.48 0.6 undecidable manual S 286 36.5412 97 0.34 45
IV.RM33.EHZ. 2023-07-21T17:10:14.50 0.6 undecidable manual S 226 37.3293 96 0.14 47
IV.ARRO.EHZ. 2023-07-21T17:10:13.36 0.6 positive manual P 254 66.0894 93 -0.15 45
IV.TRTR.HHZ. 2023-07-21T17:10:13.81 0.6 undecidable manual S 76 30.9468 99 1.13 35
IV.CESI.HHZ. 2023-07-21T17:10:12.23 0.6 undecidable manual P 300 59.6958 93 -0.3 44
IV.GIGS.HHZ. 2023-07-21T17:10:12.55 0.6 undecidable manual S 176 32.0457 98 -0.42 44
IV.MF5.EHZ. 2023-07-21T17:10:12.33 0.6 undecidable manual S 346 28.1496 100 0.38 45
IV.MMO1.EHZ. 2023-07-21T17:10:11.09 0.6 undecidable manual S 315 24.9528 103 0 49
IV.CAMP.HHZ. 2023-07-21T17:10:11.20 0.6 undecidable manual S 206 25.3524 102 -0.01 49
IV.SMA1.EHZ. 2023-07-21T17:10:10.19 0.6 undecidable manual S 234 21.0678 107 0.1 49
IV.LNSS.HHZ. 2023-07-21T17:10:10.18 0.3 positive manual P 250 43.9227 95 0.07 70
IV.CSP1.EHZ. 2023-07-21T17:10:10.34 0.1 undecidable manual P 325 47.619 95 -0.34 89
IV.FDMO.HHZ. 2023-07-21T17:10:10.46 1.0 positive manual P 312 49.5171 94 -0.51 21
IV.NRCA.HNZ. 2023-07-21T17:10:08.76 0.3 positive manual P 286 36.5412 97 -0.21 70
IV.RM33.EHZ. 2023-07-21T17:10:08.97 0.1 undecidable manual P 226 37.3293 96 -0.13 95
IV.MTRA.EHZ. 2023-07-21T17:10:08.08 0.6 undecidable manual S 278 12.1767 127 0.1 49
IV.TRTR.HHZ. 2023-07-21T17:10:08.40 0.1 undecidable manual P 76 30.9468 99 0.28 94
IV.TERO.HNZ. 2023-07-21T17:10:08.63 0.6 undecidable manual S 160 14.0748 122 0.25 49
IV.CAMP.HHZ. 2023-07-21T17:10:07.14 0.1 positive manual P 206 25.3524 102 -0.14 96
IV.ASCOL.EHE. 2023-07-21T17:10:07.76 0.6 undecidable manual S 17 12.6762 126 -0.32 47
IV.MF5.EHZ. 2023-07-21T17:10:07.17 1.0 positive manual P 346 28.1496 100 -0.53 22
IV.GIGS.HHZ. 2023-07-21T17:10:07.83 0.1 positive manual P 176 32.0457 98 -0.47 88
IV.OFFI.HHE. 2023-07-21T17:10:07.25 0.1 undecidable manual P 28 24.3534 103 0.13 97
IV.MMO1.EHZ. 2023-07-21T17:10:07.03 0.1 undecidable manual P 315 24.9528 103 -0.18 96
IV.SMA1.EHZ. 2023-07-21T17:10:06.60 0.1 positive manual P 234 21.0678 107 -0.03 99
IV.MTRA.EHZ. 2023-07-21T17:10:05.47 0.1 positive manual P 278 12.1767 127 0.06 100
IV.TERO.HNZ. 2023-07-21T17:10:05.69 0.3 negative manual P 160 14.0748 122 0.05 75
IV.ASCOL.EHE. 2023-07-21T17:10:05.31 0.1 undecidable manual P 17 12.6762 126 -0.16 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HNN. ML:3.0 0.009565 0.16 AML other m 2023-07-21T17:10:08.76
IV.TERO.HNE. ML:2.6 0.0035800000000000003 0.16 AML other m 2023-07-21T17:10:08.89
IV.MMO1.EHE. ML:2.4 0.00157 0.74 AML other m 2023-07-21T17:10:11.24
IV.MMO1.EHN. ML:2.5 0.0017250000000000002 1.46 AML other m 2023-07-21T17:10:11.22
IV.RM33.HNN. ML:2.3 0.0006605000000000001 1.48 AML other m 2023-07-21T17:10:14.24
IV.RM33.EHN. ML:2.3 0.0007230000000000001 1.5 AML other m 2023-07-21T17:10:14.24
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
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