Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 26-04-2023 and time 11:07:33 (Italy) in region 7 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.4 earthquake occured in region: 7 km SE Castelsantangelo sul Nera (MC), on

  • 26-04-2023 09:07:33 (UTC)
  • 26-04-2023 11:07:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8540, 13.2250 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.

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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
Castelsantangelo sul Nera MC 7 281 281
Montegallo AP 9 523 804
Montemonaco AP 10 604 1408
Arquata del Tronto AP 11 1178 2586
Ussita MC 12 444 3030
Norcia PG 13 4957 7987
Montefortino FM 14 1178 9165
Visso MC 14 1107 10272
Preci PG 15 724 10996
Bolognola MC 16 142 11138
Accumoli RI 18 667 11805
Acquasanta Terme AP 18 2916 14721
Amandola FM 18 3629 18350
Comunanza AP 19 3166 21516
Palmiano AP 20 196 21712
Acquacanina MC 20 121 21833

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
45 Km W of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
58 Km N of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
88 Km S of Ancona (100861 inhabitants)
92 Km W of Pescara (121014 inhabitants)
95 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
Bulletin
Rev1000 		ML 1.4 2023-04-26
09:07:33		 42.854 13.2248 8 2024-03-01
17:18:07		 Bollettino Sismico Italiano INGV 117220841
Reviewed
Rev100 		ML 1.6 2023-04-26
09:07:34		 42.8577 13.2165 9 2023-04-26
09:15:44		 Sala Sismica INGV-Roma 116764931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-26 09:07:33 ± 0.07
Latitude 42.8540 ± 0.0036
Longitude 13.2248 ± 0.0049
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117220841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 372
Semi-minor axis of confidence ellipse (meter) 219
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) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 116764931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-26 09:15:44

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 117220841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-02 16:28:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2023-04-26T09:07:47.70 0.3 undecidable manual S 130 40.1265 50 -0.14 69
IV.RM33.EHZ. 2023-04-26T09:07:47.30 0.3 undecidable manual S 181 38.3283 50 -0.04 71
IV.MML1.HNE. 2023-04-26T09:07:46.80 0.3 undecidable manual S 325 35.3424 102 0.3 68
IV.CESI.HHZ. 2023-04-26T09:07:45.00 0.1 undecidable manual S 303 30.9468 104 -0.01 97
IV.GAVE.EHN. 2023-04-26T09:07:45.60 1.0 undecidable manual S 236 32.3454 104 0.12 24
IV.LNSS.HHZ. 2023-04-26T09:07:45.60 0.3 undecidable manual S 208 31.6461 104 0.35 67
IV.MF5.EHZ. 2023-04-26T09:07:43.20 1.0 undecidable manual S 52 24.1536 108 0.45 22
IV.ASSB.HHZ. 2023-04-26T09:07:43.26 0.3 undecidable manual P 295 50.5161 50 -0.3 66
IV.GUMA.HNN. 2023-04-26T09:07:43.80 0.3 undecidable manual S 21 24.8529 107 0.83 58
IV.CSP1.EHZ. 2023-04-26T09:07:43.70 0.1 undecidable manual S 356 26.4513 106 0.2 94
IV.SMA1.EHN. 2023-04-26T09:07:43.70 0.3 undecidable manual S 160 26.3514 106 0.22 70
IV.FDMO.HHZ. 2023-04-26T09:07:42.60 0.3 undecidable manual S 331 23.1546 109 0.2 71
IV.TERO.HHZ. 2023-04-26T09:07:41.67 0.1 undecidable manual P 130 40.1265 50 -0.29 90
IV.MTRA.EHZ. 2023-04-26T09:07:41.20 0.3 undecidable manual S 128 17.6712 114 0.56 65
IV.RM33.EHZ. 2023-04-26T09:07:41.33 0.3 undecidable manual P 181 38.3283 50 -0.35 67
IV.LNSS.HHZ. 2023-04-26T09:07:40.49 0.1 undecidable manual P 208 31.6461 104 0.02 96
IV.GAVE.EHN. 2023-04-26T09:07:40.36 0.6 undecidable manual P 236 32.3454 104 -0.25 46
IV.MML1.HNE. 2023-04-26T09:07:40.94 0.3 undecidable manual P 325 35.3424 102 -0.25 68
IV.CESI.HHZ. 2023-04-26T09:07:40.16 0.1 undecidable manual P 303 30.9468 104 -0.17 93
IV.SMA1.EHN. 2023-04-26T09:07:39.57 1.0 undecidable manual P 160 26.3514 106 0.12 24
IV.CSP1.EHZ. 2023-04-26T09:07:39.30 0.1 undecidable manual P 356 26.4513 106 -0.16 94
IV.MF5.EHZ. 2023-04-26T09:07:39.82 0.3 undecidable manual P 52 24.1536 108 0.79 59
IV.GUMA.HNN. 2023-04-26T09:07:39.08 0.6 undecidable manual P 21 24.8529 107 -0.07 48
IV.NRCA.HNZ. 2023-04-26T09:07:38.20 0.1 undecidable manual S 256 9.2796 130 0.06 99
IV.MTRA.EHZ. 2023-04-26T09:07:38.13 0.1 undecidable manual P 128 17.6712 114 0.32 93
IV.MMO1.EHZ. 2023-04-26T09:07:38.10 0.1 undecidable manual S 59 9.6792 129 -0.15 97
IV.FDMO.HHZ. 2023-04-26T09:07:38.76 0.3 undecidable manual P 331 23.1546 109 -0.06 73
7F.SIB2.EHE. 2023-04-26T09:07:37.30 0.1 undecidable manual S 57 7.5813 136 -0.42 92
IV.NRCA.HNZ. 2023-04-26T09:07:36.44 0.1 undecidable manual P 256 9.2796 130 0.08 99
IV.MMO1.EHZ. 2023-04-26T09:07:36.53 0.1 undecidable manual P 59 9.6792 129 0.1 98
7F.SIB2.EHE. 2023-04-26T09:07:36.09 0.1 positive manual P 57 7.5813 136 -0.03 100
7F.SIB3.EHN. 2023-04-26T09:07:36.20 0.1 undecidable manual S 58 4.3956 151 -0.84 80
7F.SIB3.EHN. 2023-04-26T09:07:35.52 0.1 undecidable manual P 58 4.3956 151 -0.21 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.0 0.001405 0.14 AML other m 2023-04-26T09:07:38.48
IV.NRCA.HNE. ML:1.9 0.0012850000000000001 0.14 AML other m 2023-04-26T09:07:38.48
IV.NRCA.HNN. ML:1.8 0.0009339999999999999 0.6 AML other m 2023-04-26T09:07:38.54
IV.MMO1.HNE. ML:2.5 0.004266178 0.7168 AML other m 2023-04-26T09:07:39.33
IV.MMO1.EHN. ML:1.3 0.0003015 0.14 AML other m 2023-04-26T09:07:39.21
IV.MMO1.EHE. ML:1.5 0.00047050000000000005 0.16 AML other m 2023-04-26T09:07:39.24
IV.MMO1.HNN. ML:2.5 0.004422656 0.5312 AML other m 2023-04-26T09:07:39.27
IV.NRCA.HHN. ML:1.8 0.0009475 0.12 AML other m 2023-04-26T09:07:39.53
IV.MTRA.EHN. ML:1.4 0.00024349999999999998 1.18 AML other m 2023-04-26T09:07:42.72
IV.MTRA.HNN. ML:1.4 0.00021556964 0.224 AML other m 2023-04-26T09:07:42.38
IV.MTRA.HNE. ML:1.4 0.00021302442499999998 0.4352 AML other m 2023-04-26T09:07:43.01
IV.MTRA.EHE. ML:1.4 0.00021799999999999999 1.56 AML other m 2023-04-26T09:07:43.02
IV.FDMO.HHE. ML:0.9 0.000048104395 0.1984 AML other m 2023-04-26T09:07:43.65
IV.CESI.HNE. ML:1.4 0.000125265705 4.1984 AML other m 2023-04-26T09:07:46.60
IV.FDMO.HHN. ML:1.0 0.0000734 0.58 AML other m 2023-04-26T09:07:45.34
IV.LNSS.HHE. ML:0.9 0.000036980479999999995 0.1408 AML other m 2023-04-26T09:07:45.93
IV.CSP1.EHN. ML:1.2 0.00010044454 0.2752 AML other m 2023-04-26T09:07:45.90
IV.CSP1.EHE. ML:1.1 0.00007114465500000001 0.1408 AML other m 2023-04-26T09:07:46.03
IV.CESI.HHE. ML:1.1 0.0000639 1.38 AML other m 2023-04-26T09:07:46.27
IV.LNSS.HNE. ML:1.5 0.00013745295 1.472 AML other m 2023-04-26T09:07:46.49
IV.CESI.HHN. ML:1.2 0.0000677 0.26 AML other m 2023-04-26T09:07:46.39
IV.MF5.EHE. ML:1.0 0.00005806496999999999 3.3792 AML other m 2023-04-26T09:07:45.02
IV.MF5.EHN. ML:0.9 0.00005503432 0.48 AML other m 2023-04-26T09:07:46.81
IV.TERO.HNE. ML:1.6 0.00015247435 8.4288 AML other m 2023-04-26T09:07:51.39
IV.CESI.HNN. ML:1.3 0.000093552635 0.8192 AML other m 2023-04-26T09:07:47.69
IV.TERO.HHN. ML:1.1 0.000047365950000000003 0.1408 AML other m 2023-04-26T09:07:48.10
IV.LNSS.HHN. ML:1.2 0.000062808105 0.32 AML other m 2023-04-26T09:07:49.15
IV.LNSS.HNN. ML:1.5 0.0001400731 5.3632 AML other m 2023-04-26T09:07:46.47
IV.RM33.EHE. ML:0.8 0.000025907225000000003 0.1408 AML other m 2023-04-26T09:07:49.58
IV.TERO.HNN. ML:1.7 0.00017188284999999998 1.0304 AML other m 2023-04-26T09:07:50.11
IV.TERO.HHE. ML:1.3 0.000068282395 0.7808 AML other m 2023-04-26T09:07:50.39
IV.RM33.EHN. ML:0.8 0.000023100655 0.2816 AML other m 2023-04-26T09:07:50.62
IV.RM33.HNE. ML:1.6 0.00014378980000000002 4.512 AML other m 2023-04-26T09:07:51.51
IV.RM33.HNN. ML:1.6 0.0001511978 8.5312 AML other m 2023-04-26T09:07:53.27
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