Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 26-10-2023 and time 16:27:48 (Italy) in region 4 km SW Montemonaco (AP)

A magnitude ML 1.7 earthquake occured in region: 4 km SW Montemonaco (AP), on

  • 26-10-2023 14:27:48 (UTC)
  • 26-10-2023 16:27:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8710, 13.3110 at 24 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montemonaco AP 4 604 604
Montegallo AP 4 523 1127
Montefortino FM 8 1178 2305
Arquata del Tronto AP 11 1178 3483
Palmiano AP 13 196 3679
Amandola FM 13 3629 7308
Comunanza AP 13 3166 10474
Castelsantangelo sul Nera MC 13 281 10755
Roccafluvione AP 14 2010 12765
Acquasanta Terme AP 14 2916 15681
Venarotta AP 15 2066 17747
Bolognola MC 15 142 17889
Ussita MC 16 444 18333
Montefalcone Appennino FM 18 424 18757
Force AP 18 1354 20111
Sarnano MC 18 3264 23375
Smerillo FM 19 365 23740
Visso MC 19 1107 24847
Norcia PG 20 4957 29804

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Teramo (54892 inhabitants)
50 Km E of Foligno (57155 inhabitants)
58 Km N of L'Aquila (69753 inhabitants)
64 Km NE of Terni (111501 inhabitants)
79 Km NW of Montesilvano (53738 inhabitants)
79 Km E of Perugia (166134 inhabitants)
85 Km S of Ancona (100861 inhabitants)
87 Km NW of Pescara (121014 inhabitants)
91 Km NW of Chieti (51815 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 1.7 2023-10-26
14:27:48		 42.8713 13.3108 24 2023-10-26
14:37:58		 Sala Sismica INGV-Roma 122408831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-26 14:27:48 ± 0.1
Latitude 42.8713 ± 0.0036
Longitude 13.3108 ± 0.0074
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122408831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 323
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 77
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.02068
Epicentral distance of station farthest from the epicenter (degree) 0.36872
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 122408831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-26 14:37:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2023-10-26T14:27:59.02 0.3 undecidable manual S 315 25.752 127 -0.14 71
IV.CSP1.EHZ. 2023-10-26T14:27:59.39 0.6 undecidable manual S 341 25.9518 127 0.21 47
IV.SMA1.EHZ. 2023-10-26T14:27:59.44 0.6 undecidable manual S 176 26.751 126 0.07 48
IV.MF5.EHZ. 2023-10-26T14:27:58.08 0.6 undecidable manual S 43 17.6712 139 0.5 45
IV.NRCA.HHZ. 2023-10-26T14:27:57.43 0.6 undecidable manual S 255 16.5723 141 0.05 48
IV.RM33.EHZ. 2023-10-26T14:27:56.68 0.3 undecidable manual P 191 40.9257 114 -0.01 71
IV.MC2.EHE. 2023-10-26T14:27:56.94 0.6 undecidable manual S 294 10.878 153 0.39 46
7F.SIB1.EHE. 2023-10-26T14:27:56.14 0.3 undecidable manual S 308 4.1958 169 0.17 73
IV.LNSS.HHZ. 2023-10-26T14:27:56.23 0.3 undecidable manual P 217 37.0296 116 0.09 70
IV.TERO.HHZ. 2023-10-26T14:27:55.87 1.0 undecidable manual P 139 36.4413 117 -0.19 23
7F.SIB3.EHE. 2023-10-26T14:27:55.71 0.6 undecidable manual S 277 3.2967 171 -0.22 48
IV.MMO1.EHZ. 2023-10-26T14:27:55.81 0.6 undecidable manual S 23 3.3966 171 -0.12 49
7F.SIB2.EHE. 2023-10-26T14:27:55.65 0.6 undecidable manual S 345 2.2977 174 -0.24 48
IV.FDMO.HHZ. 2023-10-26T14:27:54.54 0.1 undecidable manual P 315 25.752 127 -0.12 95
IV.CSP1.EHZ. 2023-10-26T14:27:54.66 0.1 undecidable manual P 341 25.9518 127 -0.02 96
IV.SMA1.EHZ. 2023-10-26T14:27:54.72 0.6 undecidable manual P 176 26.751 126 -0.07 48
IV.MF5.EHZ. 2023-10-26T14:27:53.89 0.1 undecidable manual P 43 17.6712 139 0.14 97
IV.NRCA.HHZ. 2023-10-26T14:27:53.76 0.1 undecidable manual P 255 16.5723 141 0.13 96
IV.MC2.EHE. 2023-10-26T14:27:53.26 0.1 undecidable manual P 294 10.878 153 0.1 98
7F.SIB2.EHE. 2023-10-26T14:27:52.60 0.1 undecidable manual P 345 2.2977 174 -0.18 97
7F.SIB3.EHE. 2023-10-26T14:27:52.66 0.1 undecidable manual P 277 3.2967 171 -0.14 98
IV.MMO1.EHZ. 2023-10-26T14:27:52.64 0.1 undecidable manual P 23 3.3966 171 -0.16 97
7F.SIB1.EHE. 2023-10-26T14:27:52.88 0.1 undecidable manual P 308 4.1958 169 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.9 0.0004360000000000001 0.1 AML other m 2023-10-26T14:27:57.64
IV.NRCA.HNE. ML:1.8 0.000376 0.1 AML other m 2023-10-26T14:27:57.61
IV.NRCA.HHE. ML:1.8 0.0003765 0.1 AML other m 2023-10-26T14:27:57.61
IV.NRCA.HNN. ML:1.9 0.0004055 0.14 AML other m 2023-10-26T14:27:57.64
IV.CSP1.EHE. ML:1.9 0.000322 0.36 AML other m 2023-10-26T14:27:59.68
IV.CSP1.EHN. ML:1.7 0.00020460935000000003 0.1024 AML other m 2023-10-26T14:27:59.61
IV.LNSS.HHE. ML:1.4 0.00008060262500000001 0.256 AML other m 2023-10-26T14:28:02.61
IV.LNSS.HHN. ML:1.3 0.000058583880000000005 0.32 AML other m 2023-10-26T14:28:02.58
IV.RM33.EHE. ML:1.3 0.00005998217 0.1408 AML other m 2023-10-26T14:28:04.22
IV.RM33.EHN. ML:1.3 0.000054238785 0.1792 AML other m 2023-10-26T14:28:03.86
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