Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 01-04-2021 and time 10:57:55 (Italy) in region 8 km SW Serravalle di Chienti (MC)

A magnitude ML 1.8 earthquake occured in region: 8 km SW Serravalle di Chienti (MC), on

  • 01-04-2021 08:57:55 (UTC)
  • 01-04-2021 10:57:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0300, 12.8720 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
Serravalle di Chienti MC 8 1070 1070
Valtopina PG 10 1398 2468
Nocera Umbra PG 11 5839 8307
Monte Cavallo MC 11 145 8452
Sefro MC 15 422 8874
Pieve Torina MC 15 1458 10332
Muccia MC 15 915 11247
Foligno PG 16 57155 68402
Sellano PG 16 1079 69481
Spello PG 17 8645 78126
Pievebovigliana MC 18 866 78992
Fiordimonte MC 18 202 79194
Fiuminata MC 18 1402 80596
Pioraco MC 19 1134 81730
Trevi PG 20 8469 90199
Camerino MC 20 6974 97173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NE of Foligno (57155 inhabitants)
40 Km E of Perugia (166134 inhabitants)
55 Km NE of Terni (111501 inhabitants)
80 Km NW of Teramo (54892 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
87 Km NW of L'Aquila (69753 inhabitants)
91 Km S of Fano (60888 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
98 Km S of Pesaro (94582 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 1.8 2021-04-01
08:57:55		 43.0302 12.8715 8 2021-07-12
16:55:11		 Bollettino Sismico Italiano INGV 90132881
Reviewed
Rev100 		ML 1.8 2021-04-01
08:57:55		 43.0423 12.8753 6 2021-04-01
09:03:54		 Sala Sismica INGV-Roma 88671191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-01 08:57:55 ± 0.04
Latitude 43.0302 ± 0.0027
Longitude 12.8715 ± 0.0025
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 90132881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 254
Semi-minor axis of confidence ellipse (meter) 197
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 49
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 34
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 57
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.72395
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 44
Type of magnitude ML
Reference to an origin 90132881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-15 18:10:38

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 88671191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-01 09:03:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-04-01T08:58:19.26 3.0 undecidable manual S -0.14 0
IV.ATLO.EHZ. 2021-04-01T08:58:11.66 0.3 undecidable manual S 310 49.1175 50 0.15 68
IV.SSFR.HHZ. 2021-04-01T08:58:11.04 0.1 undecidable manual S 351 45.621 50 0.46 86
IV.CING.HNZ. 2021-04-01T08:58:11.00 0.3 undecidable manual S 34 46.4202 50 0.21 68
IV.LNSS.HHZ. 2021-04-01T08:58:11.60 0.3 undecidable manual S 164 49.3173 50 0.02 70
IV.ATFO.HHZ. 2021-04-01T08:58:10.85 0.6 undecidable manual S 327 44.5221 50 0.56 42
IV.MURB.HHZ. 2021-04-01T08:58:09.14 0.3 undecidable manual S 313 38.1285 50 0.55 63
IV.CAFI.HHZ. 2021-04-01T08:58:09.80 0.3 undecidable manual P 295 80.364 50 0.3 63
IV.MMO1.EHZ. 2021-04-01T08:58:09.00 0.1 undecidable manual S 111 39.7269 50 0 96
IV.EL6.EHZ. 2021-04-01T08:58:08.38 0.3 undecidable manual S 29 38.0286 50 -0.18 69
IV.GAVE.EHZ. 2021-04-01T08:58:08.33 0.3 undecidable manual S 177 37.5291 50 -0.09 71
IV.TERO.HHZ. 2021-04-01T08:58:08.51 3.0 negative manual P -0.27 0
IV.MOMA.HHZ. 2021-04-01T08:58:08.16 0.3 undecidable manual S 224 35.0427 50 0.39 67
IV.MPAG.EHZ. 2021-04-01T08:58:07.35 0.3 undecidable manual P 352 67.0773 50 -0.1 67
IV.MC2.EHZ. 2021-04-01T08:58:06.08 0.6 undecidable manual S 117 28.9488 106 0.28 46
IV.MGAB.HHZ. 2021-04-01T08:58:06.84 0.3 undecidable manual P 258 62.9925 50 0.02 68
IV.PIEI.HHZ. 2021-04-01T08:58:06.45 0.3 undecidable manual P 334 62.2932 50 -0.27 65
IV.FOSV.HNZ. 2021-04-01T08:58:06.30 0.1 undecidable manual S 343 30.6471 105 -0.08 96
IV.APEC.HHZ. 2021-04-01T08:58:06.98 0.3 undecidable manual P 328 68.9754 50 -0.77 55
IV.RM33.EHZ. 2021-04-01T08:58:06.72 0.3 undecidable manual P 154 64.1913 50 -0.29 65
IV.FRON.EHZ. 2021-04-01T08:58:05.45 0.3 undecidable manual P 348 55.4001 50 -0.19 67
IV.MTRA.EHZ. 2021-04-01T08:58:05.00 0.1 negative manual P 125 52.3032 50 -0.18 90
IV.CSP1.EHZ. 2021-04-01T08:58:05.57 0.1 undecidable manual S 76 27.8499 107 0.13 95
IV.CESX.HHE. 2021-04-01T08:58:05.43 0.6 undecidable manual P 206 52.2033 50 0.27 44
IV.ARVD.HHZ. 2021-04-01T08:58:05.15 0.1 undecidable manual P 6 52.2033 50 -0.01 93
IV.PF6.EHZ. 2021-04-01T08:58:05.73 0.3 undecidable manual S 65 28.749 106 0 73
IV.ATCC.EHZ. 2021-04-01T08:58:04.97 0.1 undecidable manual S 313 25.4523 108 0.34 92
IV.ATLO.EHZ. 2021-04-01T08:58:04.43 0.3 undecidable manual P 310 49.1175 50 -0.25 67
IV.MF5.EHZ. 2021-04-01T08:58:04.99 0.1 undecidable manual P 95 47.9187 50 0.49 85
IV.CING.HNZ. 2021-04-01T08:58:04.09 0.3 undecidable manual P 34 46.4202 50 -0.17 68
IV.LNSS.HHZ. 2021-04-01T08:58:04.47 0.1 negative manual P 164 49.3173 50 -0.25 89
IV.MMO1.EHZ. 2021-04-01T08:58:03.03 0.1 negative manual P 111 39.7269 50 -0.2 92
IV.ATFO.HHZ. 2021-04-01T08:58:03.75 0.1 undecidable manual P 327 44.5221 50 -0.22 91
IV.SSFR.HHZ. 2021-04-01T08:58:03.87 0.3 undecidable manual P 351 45.621 50 -0.27 67
IV.ATSC.EHZ. 2021-04-01T08:58:03.92 0.3 undecidable manual P 341 46.2204 50 -0.31 67
IV.MOMA.HHZ. 2021-04-01T08:58:02.34 0.3 undecidable manual P 224 35.0427 50 -0.18 70
IT.GNU.HGZ. 2021-04-01T08:58:02.80 0.6 undecidable manual P 224 35.0427 50 0.28 45
IV.EL6.EHZ. 2021-04-01T08:58:02.72 0.1 positive manual P 29 38.0286 50 -0.25 91
IV.GAVE.EHZ. 2021-04-01T08:58:02.66 0.3 undecidable manual P 177 37.5291 50 -0.24 69
IV.FDMO.HHZ. 2021-04-01T08:58:02.22 0.1 undecidable manual S 88 17.4714 116 0.14 97
IV.ASSB.HHZ. 2021-04-01T08:58:02.13 0.1 undecidable manual S 275 17.2716 116 0.12 97
IV.MURB.HHZ. 2021-04-01T08:58:02.84 0.1 undecidable manual P 313 38.1285 50 -0.15 93
IV.FEMA.HNZ. 2021-04-01T08:58:02.23 0.1 undecidable manual S 118 16.2726 117 0.53 89
IV.FOSV.HNZ. 2021-04-01T08:58:01.51 0.3 undecidable manual P 343 30.6471 105 -0.21 70
IV.PF6.EHZ. 2021-04-01T08:58:01.30 0.1 undecidable manual P 65 28.749 106 -0.04 97
IV.CSP1.EHZ. 2021-04-01T08:58:01.15 0.1 positive manual P 76 27.8499 107 -0.02 97
IV.MC2.EHZ. 2021-04-01T08:58:01.31 0.1 negative manual P 117 28.9488 106 -0.07 96
IV.SEF1.HNZ. 2021-04-01T08:58:00.92 0.3 undecidable manual S 25 14.3745 120 -0.18 72
IV.ATCC.EHZ. 2021-04-01T08:58:00.68 0.1 negative manual P 313 25.4523 108 -0.03 98
IV.MML1.HNZ. 2021-04-01T08:58:00.47 0.1 undecidable manual S 41 12.2766 124 -0.03 100
IT.MTCL.HGZ. 2021-04-01T08:58:00.20 0.1 undecidable manual S 111 11.0778 127 0.03 100
IV.FDMO.HHZ. 2021-04-01T08:57:59.42 0.1 positive manual P 88 17.4714 116 0.19 96
IV.ASSB.HHZ. 2021-04-01T08:57:59.33 0.1 positive manual P 275 17.2716 116 0.14 97
IV.FEMA.HNZ. 2021-04-01T08:57:59.25 0.1 negative manual P 118 16.2726 117 0.23 95
IV.SEF1.HNZ. 2021-04-01T08:57:58.76 0.3 undecidable manual P 25 14.3745 120 0.09 74
IV.MML1.HNZ. 2021-04-01T08:57:58.48 0.1 positive manual P 41 12.2766 124 0.16 97
IT.MTCL.HGZ. 2021-04-01T08:57:58.31 0.3 undecidable manual P 111 11.0778 127 0.18 73
IV.CESI.HHZ. 2021-04-01T08:57:57.87 0.1 undecidable manual S 136 3.8961 155 -0.67 86
IV.CESI.HHZ. 2021-04-01T08:57:57.05 0.1 negative manual P 136 3.8961 155 -0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:2.1 0.001185 0.16 AML other m 2021-04-01T08:58:02.24
IV.ASSB.HHE. ML:2.0 0.0008815 0.34 AML other m 2021-04-01T08:58:02.94
IV.CSP1.EHE. ML:2.2 0.0009745 1.6 AML other m 2021-04-01T08:58:06.07
IV.CSP1.EHN. ML:2.2 0.0009184999999999999 0.52 AML other m 2021-04-01T08:58:06.47
IV.ATCC.EHN. ML:1.8 0.0003725 0.76 AML other m 2021-04-01T08:58:07.15
IV.ATCC.EHE. ML:1.9 0.0004485 1.36 AML other m 2021-04-01T08:58:07.25
IV.EL6.EHE. ML:2.0 0.00039 0.9 AML other m 2021-04-01T08:58:08.92
IV.MOMA.HHE. ML:1.7 0.0001825 0.12 AML other m 2021-04-01T08:58:09.16
IV.GAVE.EHN. ML:1.8 0.000264 0.2 AML other m 2021-04-01T08:58:09.11
IV.EL6.EHN. ML:1.8 0.000253 0.38 AML other m 2021-04-01T08:58:09.18
IV.GAVE.EHE. ML:1.9 0.000313 0.24 AML other m 2021-04-01T08:58:09.21
IV.MOMA.HHN. ML:1.7 0.000217 1.06 AML other m 2021-04-01T08:58:09.43
IV.MURB.HHN. ML:2.2 0.0005529999999999999 0.14 AML other m 2021-04-01T08:58:09.93
IV.ATFO.HHN. ML:1.6 0.0001145 0.38 AML other m 2021-04-01T08:58:11.73
IV.ATFO.HHE. ML:1.6 0.0001215 0.2 AML other m 2021-04-01T08:58:11.82
IV.MURB.HNN. ML:2.1 0.0005005 1.12 AML other m 2021-04-01T08:58:11.34
IV.SSFR.HHE. ML:2.2 0.00048049999999999997 0.24 AML other m 2021-04-01T08:58:12.00
IV.SSFR.HNE. ML:2.2 0.0005285 0.22 AML other m 2021-04-01T08:58:12.01
IV.SSFR.HHN. ML:2.1 0.00037749999999999996 0.18 AML other m 2021-04-01T08:58:12.22
IV.SSFR.HNN. ML:2.2 0.000504 0.88 AML other m 2021-04-01T08:58:12.81
IV.LNSS.HHN. ML:1.9 0.000202 0.52 AML other m 2021-04-01T08:58:12.51
IV.MTRA.EHN. ML:1.8 0.000143 0.26 AML other m 2021-04-01T08:58:13.43
IV.MTRA.EHE. ML:1.7 0.00011839999999999999 0.24 AML other m 2021-04-01T08:58:13.44
IV.ARVD.HHN. ML:1.4 0.000056999999999999996 0.66 AML other m 2021-04-01T08:58:13.59
IV.MURB.HHE. ML:2.1 0.0005425 0.92 AML other m 2021-04-01T08:58:14.49
IV.MURB.HNE. ML:2.1 0.000499 0.9 AML other m 2021-04-01T08:58:14.48
IV.LNSS.HHE. ML:1.9 0.0002195 0.98 AML other m 2021-04-01T08:58:14.77
IV.MF5.EHN. ML:1.8 0.0001725 0.58 AML other m 2021-04-01T08:58:14.30
IV.ARVD.HHE. ML:1.6 0.00009570000000000001 0.4 AML other m 2021-04-01T08:58:14.41
IV.MF5.EHE. ML:1.6 0.000126 0.98 AML other m 2021-04-01T08:58:14.17
IV.FRON.EHN. ML:1.7 0.00011949999999999999 1.54 AML other m 2021-04-01T08:58:14.06
IV.FRON.EHE. ML:1.6 0.00008415 1.3 AML other m 2021-04-01T08:58:15.20
IV.PIEI.HHE. ML:1.7 0.00009065000000000001 1.88 AML other m 2021-04-01T08:58:17.00
IV.RM33.EHN. ML:1.4 0.000050350000000000004 0.36 AML other m 2021-04-01T08:58:17.02
IV.PIEI.HHN. ML:1.4 0.000042550000000000004 0.74 AML other m 2021-04-01T08:58:17.54
IV.RM33.EHE. ML:1.4 0.000046949999999999996 1.08 AML other m 2021-04-01T08:58:18.57
IV.APEC.HHN. ML:1.6 0.00006675000000000001 1.34 AML other m 2021-04-01T08:58:19.04
IV.MPAG.EHE. ML:1.2 0.00003045 0.42 AML other m 2021-04-01T08:58:19.66
IV.APEC.HHE. ML:1.5 0.00005105 0.92 AML other m 2021-04-01T08:58:19.24
IV.MPAG.EHN. ML:1.2 0.0000293 0.66 AML other m 2021-04-01T08:58:20.48
IV.TERO.HHN. ML:1.3 0.000031899999999999996 0.38 AML other m 2021-04-01T08:58:21.22
IV.TERO.HHE. ML:1.3 0.0000282 0.3 AML other m 2021-04-01T08:58:23.34
IV.CAFI.HHE. ML:1.3 0.000031450000000000006 1.1 AML other m 2021-04-01T08:58:23.57
IV.CAFI.HHN. ML:1.0 0.000017099999999999996 0.3 AML other m 2021-04-01T08:58:26.55
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